- knot-dns-users - lists.nic.cz

Too long validation time for new version

by SUN Guonian

Hello, Recently, my hidden master has had two upgrades: one from 3.6.0 to 3.6.1, and another from 3.6.1 to 3.6.2. I found that the time between "Knot DNS 3.X.Y starting" and "server started answering" has increased significantly for versions 3.6.1 and 3.6.2. I have a large DNSSEC-signed zone with about 2,700,000 records, and I have set |dnssec-validation|to |on|. For versions 3.5.8 and 3.6.0, it took about 4 minutes to restart; after 3.6.1, it took 47–48 minutes. Best Regards, SUN Guonian

3 dny, 1 hodina

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conf-import semantics unclear

by Billiam Crashkopf

Hi, I'm seeking some clarity over the semantics of 'knotc conf-import'. I'm using v3.6.1, specifically. When using the +nopurge filter with an existing configuration database, the operation fails without the use of the -f (force) option. I'm unclear on the intended semantics. Does +nopurge merge configuration in the database with settings imported from the file, or does it just skip the import altogether? Why is the force option required? $ knotc -f conf-import /usr/local/etc/knot/knot.conf +nopurge error: use force option to modify/overwrite the existing destination and ensure the server is not running! Thanks, B.C.

4 dny, 4 hodiny

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Knot DNS 3.6.2 and 3.5.10 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.6.2 and 3.5.10. These are security bug fix versions. Upgrade is recommended! Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.6.2/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.10/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 týden, 1 den

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(no subject)

by Bastien Durel

Hello, For a little while, I often see these kind of messages in knot: oct. 18 06:49:12 arrakeen knotd[1636735]: error: [geekwu.org.] DNSSEC, failed to initialize signing context (PKCS #11 token not available) When this happens, signature stops, and I only get notified by my monitoring when they're expired :/ Restarting knot is sufficent to get signing running again - no intervention needed on the HSM, the pkcs interface or anything like that. Do you have an idea of what could happening? How to debug this? (I surely can monitor logs for this message, but it's kind of a pain) Best regards, BTW, here's my HSM: # sudo -u knot pkcs11-tool --module /usr/lib/x86_64-linux-gnu/opensc-pkcs11.so --list-slots Available slots: Slot 0 (0x0): Nitrokey Nitrokey HSM (DENK01067960000 ) 00 00 token label : knot token manufacturer : www.CardContact.de http://www.cardcontact.de/ token model : PKCS#15 emulated token flags : login required, rng, token initialized, PIN initialized hardware version : 24.13 firmware version : 3.4 serial num : DENK0106796 pin min/max : 6/15 uri : pkcs11:model=PKCS%2315%20emulated;manufacturer=www.CardContact.de;serial=DENK0106796;token=knot http://www.cardcontact.de;serial=denk0106796;token=knot/

1 týden, 2 dny

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Knot DNS 3.6.1 and 3.5.9 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.6.1. This is a bug fix version. Upgrade is recommended! Special thanks go to: Joshua Rogers from AISLE Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan from Tsinghua University Version 3.5.9 backports some of the new and previously released bug fixes. Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.6.1/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.9/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 týdny, 6 dní

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systemd notify

by Anand Buddhdev

Dear Knot developers, Our Knot DNS systemd unit files do not currently have a "Type" attribute, so it defaults to "simple". This works quite well. However, we can set "Type" to one of "notify" or "notify-reload" for better systemd integration. For this, Knot DNS needs to support the READY=1, STOPPING=1, RELOADING=1 messages using sd_notify. Could you please clarify which messages Knot DNS sends? Regards, Anand Buddhdev RIPE NCC

2 týdny, 6 dní

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.export and .back files/directory

by Erwan David

Hello, I see in the directory with zones and journal I see directories journal.<timestamp>.bak (same for keys and timers) and files journal.<timestamp>.export time stamp and file date are the moment of upgrade from a knot compiled with lmdb0 to a knot compiled with lmdb1 Can I remove those files or directory ? (I suspect they are used during conversion of mdb files) -- Erwan David

3 týdny

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Serial of secondary zones changed

by Erwan David

Since upgrade to knot 3.6, when I restart the knot server, a new serial is generated for the secondary zones, putting them out of sync with the primary. Logs in 3.5 Aug 25 10:31:50 ns knot[45038]: info: [domain.] zone will be loaded Aug 25 10:31:51 ns knot[45038]: info: [domain.] zone loaded from journal, serial 2026023115 Aug 25 10:31:51 ns knot[45038]: info: [domain.] zone file loaded, serial updated 2026023115 -> 2026082500 Aug 25 10:31:51 ns knot[45038]: info: [domain.] loaded, serial none -> 2026082500 -> 2026023115, 21088 bytes, expires in 2137390 seconds Last line show the serial is set back to the serial of the journal loaded zone When starting 3.6 Sep 24 07:49:14 ns knot[23114]: info: [domain.] zone will be loaded Sep 24 07:49:14 ns knot[23114]: info: [domain.] zone loaded from journal, serial 2026023175 Sep 24 07:49:14 ns knot[23114]: info: [domain.] zone file loaded, serial updated 2026023175 -> 2026092400 Sep 24 07:49:14 ns knot[23114]: info: [domain.] loaded, serial none -> 2026092400, 21088 bytes, expires in 2158298 seconds The serial is not set back to the serail from the journal. As you can see in this case the primary does not use a date based serial number, thus the secondary is then out of sync and refuses the notifications -- Erwan David

1 měsíc

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Knot DNS 3.6.0 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.6.0! This version introduces support for DELEG processing, implements a "trash bin" for DNSSEC keys, and more. See the changelog. Today Knot DNS 3.4 has reached its end of life! Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.6.0/NEWS Migration: https://www.knot-dns.cz/docs/latest/html/migration.html#upgrade-3-5-x-to-3-… Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 měsíc, 2 týdny

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Knot DNS 3.5.8 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.8. This is a bug-fix release with two security fixes. Upgrade is recommended if TCP over XDP or DDNS with TSIG is used. Special thanks go to: Kushal Das from Sunet Gia Bui from Calif.io Jim Alves-Foss Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.8/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 měsíc, 3 týdny

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Knot DNS 3.5.7 and 3.4.11 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.7. This is a bug fix version. Upgrade is recommended! Special thanks go to: Arthur Chan from ADA Logics Qifan Zhang from Palo Alto Networks Kushal Das from Sunet Version 3.4.11 backports some of the new and previously released bug fixes. Please note that Knot DNS 3.4 will reach end of life in a few weeks! Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.7/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.4.11/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 měsíce, 1 týden

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Problem with mod-onlinesign and too large UDP Responses

by Alexander Hausner

Dear all, I use Knot 3.5.6 and have a problem with mod-onlinesign and large UDP responses. See the following example. bmgf.gv.at has 4 MX-Records, with glue-records (IPv4 and IPv6) the response don't fit in UDP, Knot answers SERVFAIL, which is some bad. Is this a known bug? With static signing there is no problem with this zone. As a temporary workaround, I removed an MX record, now the response fits in UDP. hugo ~ > dig mx bmgf.gv.at @ns1.bmgf.gv.at +dnssec +norecurse ;; communications error to 2a00:1610:0:50::35:2#53: timed out ;; BADCOOKIE, retrying. ; <<>> DiG 9.20.26 <<>> mx bmgf.gv.at @ns1.bmgf.gv.at +dnssec +norecurse ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 63299 ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: do; udp: 1232 ; COOKIE: 1177367604efa74d010000006a7ee210cb0462e2174243dd (good) ;; QUESTION SECTION: ;bmgf.gv.at. IN MX ;; Query time: 2 msec ;; SERVER: 2a00:1610:0:50::35:2#53(ns1.bmgf.gv.at) (UDP) ;; WHEN: Fri Aug 14 11:38:24 CEST 2026 ;; MSG SIZE rcvd: 67 hugo ~ > dig mx bmgf.gv.at @ns1.bmgf.gv.at +dnssec +norecurse +tcp ; <<>> DiG 9.20.26 <<>> mx bmgf.gv.at @ns1.bmgf.gv.at +dnssec +norecurse +tcp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51923 ;; flags: qr aa; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 17 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: do; udp: 1232 ; COOKIE: c6a7f32e776ee047010000006a7ee21ac217503f358d8896 (good) ;; QUESTION SECTION: ;bmgf.gv.at. IN MX ;; ANSWER SECTION: bmgf.gv.at. 10800 IN MX 50 m4.bmgf.gv.at. bmgf.gv.at. 10800 IN MX 50 m1.bmgf.gv.at. bmgf.gv.at. 10800 IN MX 50 m2.bmgf.gv.at. bmgf.gv.at. 10800 IN MX 50 m3.bmgf.gv.at. bmgf.gv.at. 10800 IN RRSIG MX 14 3 10800 20260828093834 20260814080834 50873 bmgf.gv.at. ix7J58s4ypgmFdEz9vC7Ua0kSgSGIpoQS7dWHpnJaWYBfORKdJqfjyMH 5DwD34tLa9Ni1evugObc9Mm+fA/xgiXRGSXTgFyPWgaWpQGHLZG61Ho+ +76SRZYwTRa/oJpf ;; ADDITIONAL SECTION: m1.bmgf.gv.at. 86400 IN A 194.48.236.129 m1.bmgf.gv.at. 86400 IN AAAA 2a00:1610:0:50::19:1 m2.bmgf.gv.at. 86400 IN A 194.48.236.130 m2.bmgf.gv.at. 86400 IN AAAA 2a00:1610:0:50::19:2 m3.bmgf.gv.at. 86400 IN A 194.48.238.131 m3.bmgf.gv.at. 86400 IN AAAA 2a00:1610:0:51::19:1 m4.bmgf.gv.at. 86400 IN A 194.48.238.130 m4.bmgf.gv.at. 86400 IN AAAA 2a00:1610:0:51::19:2 m1.bmgf.gv.at. 86400 IN RRSIG A 14 4 86400 20260828093834 20260814080834 50873 bmgf.gv.at. Y2jZzelOx9K50ArysU41iuLiJjl72eicSHkKeK2gK6/RvCG5E0QkktQ1 Ex58vZWXYradR8gaE/fAQLo7fjJ0Ovq7EhVuE+Nb6cnfWNjCP3AHX6BE qr7DTgoSMeJ47NsJ m1.bmgf.gv.at. 86400 IN RRSIG AAAA 14 4 86400 20260828093834 20260814080834 50873 bmgf.gv.at. gTSHczdHuFYiW7FWEOXU1CK2ap/XSDaYQRV9pD3+PvGlaXf1oo0Xv/uX U1CyHhuS90ekXnqicgduA0ssGNgwYmYvoeTOshT/juuCy8sqGz1bd6Jv VRmT9Tdjiact4Qh/ m2.bmgf.gv.at. 86400 IN RRSIG A 14 4 86400 20260828093834 20260814080834 50873 bmgf.gv.at. a9WC+6E05xVjXdgeA7fStV1rG3FGpTpf9tC5IyKbAp7drnENlxY2zEI6 1OlYmV2zhVIUsQ6G0454BsHiUZJUSQcM9pN7Fi09dYV/toK1wdZTuF5Q gLGM4ykgoZAoW8S0 m2.bmgf.gv.at. 86400 IN RRSIG AAAA 14 4 86400 20260828093834 20260814080834 50873 bmgf.gv.at. DWMNJH62Grvy3HEc6Vp3DcwF98iVyj4xthEQtVD5sITimPAzIgV/hMDm fQ8zhDIQ1LO2Z6czR4PPXdommZCCTdouV5c4GWnDCTJexP8v8DAjmXiA MibMxqidbujrRdj7 m3.bmgf.gv.at. 86400 IN RRSIG A 14 4 86400 20260828093834 20260814080834 50873 bmgf.gv.at. bTTmNigjqdhPZ22ncMVZtKb0MpeicV3TJRnPY2I8bKujqIvyLfcVEk4R QUt4rJkqlNwLclVK7MreGR8GvWQRFeLI5L+EleB/V6wWmLYq6/cwGQSN 0+eHKXoW3ZDeYKDV m3.bmgf.gv.at. 86400 IN RRSIG AAAA 14 4 86400 20260828093834 20260814080834 50873 bmgf.gv.at. mB2MK+qhyyZKlKonarYnJlHlAFaSwm46o1rv1rU9MyL0Uu1LZyt/pmZ5 e5SGQAIyKcbhIM1C5/TzyWVrYcbAtFTPmauBNQmJf2AVLdzxZHvxIpOc trmphwY+Kj2CxU7U m4.bmgf.gv.at. 86400 IN RRSIG A 14 4 86400 20260828093834 20260814080834 50873 bmgf.gv.at. 5Edu5spf8YkWA/tpzpyZguDlO0hxcxpsDbXM4RM1AjwzjTGgYzIDcn6D MMleg89vLwotGB0Rx9CFo2Ojrf0gQFIkjEU94NTvid2L0haEGx5RZMN9 TnnIczIYX2nPN5HE m4.bmgf.gv.at. 86400 IN RRSIG AAAA 14 4 86400 20260828093834 20260814080834 50873 bmgf.gv.at. YD8kOs9smUoGXI3XUL4e6hst+ET7JwAeRzXLaE48FWzQOtUPI1pyH7rO b7RDHqw+sTomMMrNQV7Vrq3PVG4P/Ammk3O1MVr1fCfeEdgyh/ExI8xN BusfA05QJ6pK9pZL ;; Query time: 4 msec ;; SERVER: 2a00:1610:0:50::35:2#53(ns1.bmgf.gv.at) (TCP) ;; WHEN: Fri Aug 14 11:38:34 CEST 2026 ;; MSG SIZE rcvd: 1573 Best Regards, Alexander Hausner

2 měsíce, 2 týdny

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knotd v3.5.6 fails to start if it fails to load QUIC/TLS keys or certificates

by Max Hearnden

knotd still fails to start if it can't load certificates or keys. This appears to be a bug given that "knotd: server crashes when it fails to load a QUIC/TLS key" is in the release notes for knot-dns v3.5.6. Below is a patch that allows the server to start if knotd can't load the certificates/keys. --- src/knot/server/server.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/src/knot/server/server.c b/src/knot/server/server.c index 8de6f1a8f..e03178144 100644 --- a/src/knot/server/server.c +++ b/src/knot/server/server.c @@ -824,9 +824,10 @@ static int configure_sockets(conf_t *conf, server_t *s) s->quic_active = conf->cache.xdp_quic > 0 || convent_quic > 0 || quic_rmt_count(conf, C_QUIC) > 0; s->tls_active = convent_tls > 0 || quic_rmt_count(conf, C_TLS) > 0; if (s->quic_active || s->tls_active) { - if (init_creds(conf, s) != KNOT_EOK) { - server_deinit_iface_list(newlist, nifs); - return KNOT_ERROR; + int ret; + if ((ret = init_creds(conf, s)) != KNOT_EOK) { + log_error("failed to configure server credentials (%s)", + knot_strerror(ret)); } } -- 2.54.0

2 měsíce, 2 týdny

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grafana dashboard

by Randy Bush

deb13 knot 3.5.6 prometheus 2.53.3+ds1-2 grafana 13.0.2 i am running the [python version](https://gitlab.nic.cz/knot/knot-dns/-/tree/master/python/knot_exporter) of knot_exporter on the dns server .../knot-exporter --web-listen-addr 666.42.7.11 --web-listen-port 9443 prometheus on my webby host seems to be pulling happily from 9443 of the knotty server. i.e. http://knotty.host:9443/metrics has a lot of data and http://webby.host:9090/metrics has data and grafana drilldown/metrics has pretty data but which main grafana dashboard json should i be using for knot? https://grafana.com/grafana/dashboards/14989-knot-metrics-dashboard/ displays a lot of No Data randy

2 měsíce, 3 týdny

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Knot management tools?

by Billiam Crashkopf

Currently we are managing our knot configuration and zones via text editor and shell commands. It would be nice to find something abit more user-friendly so we can pass off some management tasks to less experienced operators. I am currently researching options to see what best fits our use case. My question is to other Knot users on this mailing list: What management tools are you using with Knot? Much obliged, -BC

3 měsíce

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DDNS update prerequisites???

by edv＠null-route.com

Not sure how to capture better data (both platforms are running DEBUG level logs), but I'm running into an odd issue. DHCP server is Kea v3.0.3 (part of the OpnSense distribution, so can't be easily updated to "latest") on FreeBSD. DNS server is Knot v3.5.6 on Debian Trixie. Kea is handing out both IPv4 and IPv6 addresses with: "ddns-replace-client-name": "always" set for all ranges /zones. However, DDNS is not updating the zone records; A, AAAA, or PTR. On the Kea side I get: ERROR [kea-dhcp-ddns.d2-to-dns.0x90effa75010] DHCP_DDNS_ADD_FAILED DHCP_DDNS Request ID 00020129B7C04BF0FCBC35ACB85DE1ADD2747633BB2B32C6D7B4F195CF4667783622B5: Transaction outcome Status: Failed, Event: UPDATE_FAILED_EVT, Forward change: failed, Reverse change: failed, request: Type: 0 (CHG_ADD) On the Knot DNS side I get: ACL, allowed, action update, remote 192.168.144.1@57483 UDP DDNS, processing 1 updates DDNS, incoming, remote 192.168.144.1@57483 TCP, prerequisites not met (UPDATE prerequisite not met) DDNS, finished, no changes to the zone were made But no clue as to what prerequisite is missing, unmet, incorrect, etc. Any idea how I can dig up that nugget of information? Or increase verbosity to give me enough DEBUG logs to figure it out?

3 měsíce

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simplest way to get stats

by Randy Bush

deb13 knot 3.5.6 i just want a few stats for a few zones, a la mod-stats: - id: custom server-operation: on query-type: on and it is a one-shot, i just want a one day sample is there a brutally simple way to get them out? yes, i can be attracted to shiny objects such as prometheus/grafna, which i use for other purposes. but ... i hesitate to run prometheus on the dns server, it has enough to do. i do have prometheus running with grafana on a remote host. knot-exporter leads me down a `python3 -m venv foo` rabbit hole, which feels pretty weird and unnatural and do i really need to do all this just to get simple stats out? randy

3 měsíce

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Knot DNS 3.5.6 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.6. This is a bug-fix release with a security fix for ACL evaluation. Upgrade is recommended if certificate hostname verification is enabled. Note that Knot DNS 3.5 is not compatible with LMDB 1.x. The upcoming Knot DNS version 3.6, which is expected to be released in two months, will support automatic migration of LMDB databases to version 1.x. Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.6/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 měsíce, 1 týden

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LMDB version compatibility issues

by Anand Buddhdev

Hi Knot DNS developers, I've seen the discussion about the breaking changes between LMDB 0.9 and 1.0. I understand that Knot DNS 3.6 will have some magic in it to automatically migrate the databases. However, my concern is about the installation of LMDB itself. Currently, our Knot DNS packages depend on the "lmdb-libs" package from the distribution (RedHat and derivatives), and it is version 0.9.x. RedHat is conservative, is unlikely to update to 1.0, because that would break everything, so I expect the RedHat packages to remain at 0.9. Will the new Knot DNS require newer LMDB, and if so, is it expected that we'll have to roll our own packages for LMDB? Or do you intend to bundle LMDB with Knot DNS as you do with some other libraries? Regards, Anand Buddhdev RIPE NCC

3 měsíce, 1 týden

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[heads up] upgrading lmdb to version 1.0

by Michael Grimm

Hi, I do want to point out: http://www.lmdb.tech/doc/upgrading.html tl;dr dump your databases *before* upgrading. I got bitten by this on FreeBSD and had had to fall back to lmdb 0.93.5 Has anyone succeeded in this migration your knot databases to lmdb 1.0? Which knot databases are involved? (journal, timers, kasp, …?) Thanks and regards, Michael

3 měsíce, 3 týdny

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knot blocked

by Erwan David

Hello Each action I try to do on knot gets the error error: failed to load configuration file '/usr/local/etc/knot/knot.conf' (MDB_BAD_TXN: Transaction must abort, has a child, or is invalid) What can I do ? (configuration not changed recently)

3 měsíce, 3 týdny

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Regarding multi-signer operations

by Smith

Hi I have two questions about this blog post on multi-signers: https://en.blog.nic.cz/2025/05/07/knot-dns-in-a-complex-dnssec-topology/ First, the blog post shows auto-increment SOA serial mode for the zone files in-line with the docs example: ``` zonefile-sync: -1zonefile-load: difference-no-serial journal-content: all ``` This would work fine for me in general, I don't mind zone files being the "source of truth". But the docs has a note "This mode is not suitable if the zone can be modified externally (e.g. DDNS, knotc)." Do I understand correctly that this is because any dynamic changes to the zone get wiped on reboot ? So, for example, if the only external DDNS modification in my environment is DNS-01 for cert issuance, it won't cause me a problem, because those are ephemeral by nature anyway ? This then raises the second question, how would I deal with catlog zones with this concept of multi-signers ? Or are catlog zones too much trouble in a multi-signer environment ? Thank you

3 měsíce, 3 týdny

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Yubikey HSM

by Ulrich Wisser

Hello! Has anybody here got knot to sign with a Yubikey HSM? Asking for a friend! :-) /Ulrich

4 měsíce

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what does "disposal of old contents blocked by outstanding zone transfer" mean?

by Jan-Piet Mens

Hello! I'm testing periodic key rollovers in a playground running Knot DNS 3.5.4 (I am aware that 3.5.5 is out, but this message is also in the current source code) Zone transfers are not being performed, neither incoming nor outgoing (the latter occasionally to see zone content as shown below). At the completion of each signing operation (with purposely very short timings), I see the following debug output: 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, signing zone 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, KSK rollover started 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, next key action, KSK tag 18749, submit at 2026-06-19T08:40:42+0000 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, key, tag 15175, algorithm ECDSAP256SHA256, KSK 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, key, tag 14234, algorithm ECDSAP256SHA256, public, active 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, key, tag 60870, algorithm ECDSAP256SHA256, KSK, public, active 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, key, tag 18749, algorithm ECDSAP256SHA256, KSK, public, active+ 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, signing started 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, successfully signed, serial 94, new RRSIGs 3 2026-06-19T08:39:32+0000 info: [b.net.] DNSSEC, next signing at 2026-06-19T08:40:42+0000 2026-06-19T08:39:32+0000 info: [b.net.] zone file updated, serial 93 -> 94 2026-06-19T08:39:32+0000 debug: [b.net.] disposal of old contents blocked by outstanding zone transfer 2026-06-19T08:40:42+0000 info: [b.net.] DNSSEC, signing zone 2026-06-19T08:40:42+0000 notice: [b.net.] DNSSEC, KSK submission, waiting for confirmation 2026-06-19T08:40:42+0000 info: [b.net.] DNSSEC, key, tag 15175, algorithm ECDSAP256SHA256, KSK 2026-06-19T08:40:42+0000 info: [b.net.] DNSSEC, key, tag 14234, algorithm ECDSAP256SHA256, public, active 2026-06-19T08:40:42+0000 info: [b.net.] DNSSEC, key, tag 60870, algorithm ECDSAP256SHA256, KSK, public, active 2026-06-19T08:40:42+0000 info: [b.net.] DNSSEC, key, tag 18749, algorithm ECDSAP256SHA256, KSK, public, ready, active+ 2026-06-19T08:40:42+0000 info: [b.net.] DNSSEC, signing started 2026-06-19T08:40:42+0000 info: [b.net.] DNSSEC, successfully signed, serial 95, new RRSIGs 6 2026-06-19T08:40:42+0000 info: [b.net.] DNSSEC, next signing at 2026-07-03T06:45:11+0000 2026-06-19T08:40:42+0000 info: [b.net.] zone file updated, serial 94 -> 95 2026-06-19T08:40:42+0000 debug: [b.net.] disposal of old contents blocked by outstanding zone transfer 2026-06-19T08:40:42+0000 info: [b.net.] DS check, outgoing, remote 127.0.0.2@53 TCP, key p01., KSK submission check: negative 2026-06-19T08:40:52+0000 info: [b.net.] DS push, outgoing, remote 127.0.0.2@53 TCP, key p01., success 2026-06-19T08:41:42+0000 info: [b.net.] DS check, outgoing, remote 127.0.0.2@53 TCP, key p01., KSK submission check: positive 2026-06-19T08:41:42+0000 notice: [b.net.] DNSSEC, KSK submission, confirmed The zone itself is trivially short: $ dig -p 5340 @127.0.0.1 b.net AXFR +noall +answer +onesoa | ldns-read-zone -s b.net. 60 IN SOA ns.b.net. root.b.net. 100 10800 3600 604800 3600 www.b.net. 60 IN HTTPS 0 b.net. ns.b.net. 60 IN AAAA 2001:db8:2::4444 ns.b.net. 60 IN A 192.0.2.42 b.net. 60 IN NSEC3PARAM 1 0 0 - b.net. 60 IN DNSKEY 257 3 13 zmXFV/KHpRk/E6l7oiRg2f2M+YpWxGqHFJtHmsAFl4KAxZPeiL2VIFLswpGnrwxO47//vz/I1VqsLhmUz9k35A== ;{id = 18749 (ksk), size = 256b} b.net. 60 IN DNSKEY 256 3 13 x9PPypMDeXRarFtYwxT5uvQjE/DHQd6g+NcF5FkVGDhz/+Xq2r3ZDfLXYUjW1ivoZHstnH5hSC4znp9oghlLfw== ;{id = 38612 (zsk), size = 256b} b.net. 60 IN TXT "DNS is innocent" b.net. 60 IN NS ns.b.net. and the IMO relevant bits of the configuration are: acl: - id: all_xfr address: [ 127.0.0.1 ] action: [ transfer, notify ] submission: - id: pdns_submission check-interval: 60s parent: pdns_remote parent-delay: 10s template: - id: default storage: "/tmp/zones" zonefile-load: difference file: "%s" policy: - id: autoFAST keystore: pemstore single-type-signing: off manual: off algorithm: ecdsap256sha256 ksk-shared: off ksk-lifetime: 1h zsk-lifetime: 2h delete-delay: 1h propagation-delay: 10s nsec3: on nsec3-iterations: 0 nsec3-salt-length: 0 nsec3-salt-lifetime: 0 cds-cdnskey-publish: rollover zone-max-ttl: 60s ksk-submission: pdns_submission ds-push: pdns_remote zone: - domain: b.net dnssec-signing: on dnssec-policy: autoFAST acl: [ all_xfr ] Ought I be worried about "disposal of old contents blocked by outstanding zone transfer"? I don't think I've noticed that before. A second zone which uses the same policy shows the same behaviour. Best regards, -JP

4 měsíce, 1 týden

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Knot DNS 3.5.5 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.5. This is a bug fix version with some improvements. Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.5/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

4 měsíce, 1 týden

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[BUG] AXFR responses missing AA bit (RFC 5936 violation) in Knot 3.5.x

by Mateusz Masłowski

Hello, I would like to report a bug in Knot DNS 3.5.x where AXFR responses do not have the Authoritative Answer (AA) bit set, which appears to violate RFC 5936 §2.2. Affected versions tested: - 3.5.3 - 3.5.4 Packages tested: - cznic.1~bookworm Summary RFC 5936 §2.2 states: "Each DNS message returned by the AXFR server MUST have the AA bit set to 1." However, Knot DNS sends AXFR responses with flags set to qr only. The AA bit is not set in any of the messages in the transfer stream. As a result, strict secondary DNS servers, notably Windows Server DNS, reject such responses as invalid and abort the zone transfer. Expected behavior AXFR response messages should have the AA bit set. Expected flags: qr aa Actual behavior AXFR response messages have only the QR bit set. Actual flags: qr Possible root cause The function axfr_process_query() in src/knot/nameserver/axfr.c does not appear to call knot_wire_set_aa(). By contrast, the normal query path, via solve_answer() in internet.c, does set the AA bit, so SOA, A, and other authoritative responses are returned correctly. The AXFR code path appears to bypass this logic. Minimal reproducer dig @<knot-master> +tcp AXFR <zone> | head -2 Observed output: ;; flags: qr; The AA bit is missing. This can also be verified with tcpdump: byte 3 of each DNS message in the AXFR stream has value 0x80 / QR only, instead of 0x84 / QR + AA. -- Best regards, Mateusz Masłowski

4 měsíce, 2 týdny

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Glue Record Problem

by Stefan Estada

Hi all I am having trouble forwarding a subdomain since I upgraded to the latest knot. For a couple of years I have been running a custom DNS server under dynamic.estada.ch that the clients find via my regular infrastructure. On my primary zone I have these records, but knot appears to answer weirdly: *estada.ch.zone* dynamic.estada.ch. 3600 A 185.194.239.135 dynamic.estada.ch. 3600 AAAA 2a0a:51c0::12b dynamic.estada.ch. 3600 NS dynamic.estada.ch. kdig AAAA dynamic.estada.ch @ns1.estada.ch ;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 29173 ;; Flags: qr rd; QUERY: 1; ANSWER: 0; AUTHORITY: 1; ADDITIONAL: 3 ;; EDNS PSEUDOSECTION: ;; Version: 0; flags: ; UDP size: 1232 B; ext-rcode: NOERROR ;; QUESTION SECTION: ;; dynamic.estada.ch. IN AAAA ;; AUTHORITY SECTION: dynamic.estada.ch. 3600 IN NS dynamic.estada.ch. ;; ADDITIONAL SECTION: dynamic.estada.ch. 3600 IN A 185.194.239.135 dynamic.estada.ch. 3600 IN AAAA 2a0a:51c0::12b But public servers don't get the glue records: kdig AAAA dynamic.estada.ch @9.9.9.9 ;; ->>HEADER<<- opcode: QUERY; status: SERVFAIL; id: 63899 ;; Flags: qr rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 1 ;; EDNS PSEUDOSECTION: ;; Version: 0; flags: ; UDP size: 1232 B; ext-rcode: NOERROR ;; QUESTION SECTION: ;; dynamic.estada.ch. IN AAAA The trouble is that most resolvers are now unable to resolve the domain as the AAAA and A queries still get answered with NS + additional A+AAAA. Is there a configuration option to tell knot to actually respond with the A or AAAA record when asked? Also ANY, TXT, or CAA queries behave the same as NS queries: kdig ANY dynamic.estada.ch @ns1.estada.ch ;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 14419 ;; Flags: qr rd; QUERY: 1; ANSWER: 0; AUTHORITY: 1; ADDITIONAL: 3 ;; EDNS PSEUDOSECTION: ;; Version: 0; flags: ; UDP size: 1232 B; ext-rcode: NOERROR ;; QUESTION SECTION: ;; dynamic.estada.ch. IN ANY ;; AUTHORITY SECTION: dynamic.estada.ch. 3600 IN NS dynamic.estada.ch. ;; ADDITIONAL SECTION: dynamic.estada.ch. 3600 IN A 185.194.239.135 dynamic.estada.ch. 3600 IN AAAA 2a0a:51c0::12b I am happy for any pointers you may have. Cheers, Stefan

4 měsíce, 3 týdny

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Standby masters, how to?

by Michael Grimm

Hi, until now I had 3 secondaries running and a hidden primary. This ran perfectly well. Now, I'd like to add some fallback functionality to deal with a potential longer downtime of my hidden primary. Thus I added two more hidden primaries such that now every host (3) has a hidden primary that can serve every secondary at all hosts. But: Only one should be active! Zone and database data will frequently be rsynced to both inactive primaries. If there would be a downtime I will have to start one of the others to continue. According to my understanding of https://www.knot-dns.cz/docs/3.5/html/configuration.html#secondary-slave-zo… I have been in the naive understanding that a configuration like ... remote: - id: primaryMWN # MWN hidden primary (running) address: 10.0.1.203@5333 - id: primaryKBN # KBN hidden primary (not running, standby) address: 10.0.2.203@5333 - id: primaryEDN # EDN hidden primary (not running, standby) address: 10.0.3.203@5333 template: - id: default master: [primaryMWN, primaryKBN, primaryEDN] # queried in that order … would work, because of: "Note that the master option accepts a list of remotes, which are queried for a zone refresh sequentially in the specified order. When the server receives a zone change notification from a listed remote, only that remote is used for a subsequent zone transfer." But I do get error massages like: edn.ellael.lan (ns3) knot[29856]: warning: [ellael.org.] refresh, remote primaryKBN not usable edn.ellael.lan (ns3) knot[29856]: info: [ellael.org.] refresh, remote primaryEDN, address 10.0.3.203@5333, failed (connection reset) edn.ellael.lan (ns3) knot[29856]: warning: [ellael.org.] refresh, remote primaryEDN not usable edn.ellael.lan (ns3) knot[29856]: error: [ellael.org.] refresh, failed (no usable master), next retry at 2026-04-27T19:03:03+0200, expires in 1119353 seconds edn.ellael.lan (ns3) knot[29856]: error: [ellael.org.] zone event 'refresh' failed (no usable master) If I do use "master: primaryMWN" only, everything runs as expected. I must have misunderstood something ... Ok, I will have to modify all remaining secondary's knot.conf files if desaster strikes and another primary has to take over. BTW: I wanted to omit a multi primary setup as mentioned in https://www.knot-dns.cz/docs/3.5/singlehtml/#multi-primary because I do have the feeling that this is some sort of overkill for hosting 5 domains, only ;-) Are there other ways to achieve my goal? ;-) Thanks and regards, Michael

6 měsíců

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Knot DNS 3.5.4 and 3.4.10 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.4. This is a bug fix version with some improvements. Upgrade is recommended, especially for those who use the module for online DNSSEC signing (mod-onlinesign)! Version 3.4.10 backports some of the bug fixes. Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.4/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.4.10/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

6 měsíců

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Adding ALIAS local resolution to knot-dns

by brong＠fastmailteam.com

Hi, Fastmail has been running Knot for a few years now. Thank you for such excellent software! I'm new to this list, and new to the Knot codebase, but I'm an experienced C developer and have been working on Cyrus IMAPd (a mostly C codebase) for many years. We have hundreds of thousands of domains, and currently they all have the same set of service IPs compiled into them. This has generally been fine - setting up a new server takes an hour or so to build all the domains, but we just wait until it's done then bring it into rotation. Our current challenge -- we want to be able to transfer everything to a new IP range quickly for datacenter failover. Rebuilding every zone is too expensive for this. I looked at a few different issues and (along with Claude) figured that it wasn't much work to extend the ALIAS type to follow the pointer to another zone inside the same server and return the records from that. I have an initial pass at: https://github.com/fastmail/knot-dns/tree/local-alias-synth For now I've kept it as separate commits showing the evolution of the idea as I've tested it more and thought through how I want it to interact (basically any ALIAS get substituted with the contents of the name it points to, so you can mix and match them all sorts of ways). I'm very happy to engage on testing and modifying this code to match what the upstream project wants; or revisit the approach if this doesn't match your vision. I just need something that has these properties, and this seemed a good way to get there. Thanks, Bron.

6 měsíců, 1 týden

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Seeking signing stats with significant speed

by Leo Vandewoestijne

Hello, In this other use-case, described in the thread "IXFR commit time scaling", there was a reply refering to https://www.knot-dns.cz/docs/3.5/singlehtml/#signing-threads and https://www.knot-dns.cz/docs/3.5/singlehtml/#adjust-threads Which made me wonder... a] you can have an external networked HSM, which sounds promising to speed up signing a lot... b] nowadays you also have even 128 core processers, even mutiple CPU slots, which sounds as a immense boost for co-proccesing... c] you could combine those... Clinical data would propably be hard, but hypothetical/esitimated; what would be wise/pointless/smart/insane to increase signing of large zones? I'd expect that RAM speed is a major factor also. What would be an ideal setup today? -- With kind regards, Met vriendelijke groet, Mit freundlichen Grüß, Leo Vandewoestijne <***(a)dns.company> <www.dns.company>

7 měsíců, 1 týden

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IXFR commit time scaling

by Jonathan Reed

Hi Knot team, I'm running Knot as an Auth secondary receiving IXFR from a BIND 9 primary. To isolate bottlenecks I've stripped the config down as far as I know how. Here's what I'm using. zonefile-sync: -1 zonefile-load: none journal-content: none There is no DNSSEC or any downstream IXFR serving happening. Logs are confirming that it is genuine IXFR and no signs of any AXFR fallback. "semantic-checks" is off, and knotd is linked against jemalloc. I'm really trying to make this as quick as possible by avoiding the disk. The pattern: IXFR processing time scales roughly proportionally with total zone size, even when the changeset is small, for example, a few hundred RRs out of several hundred thousand. There is what appears to be a full zone walk on every IXFR commit in the adjust logic, with single threaded execution due to parent befroe child ordering requirements. Although I'd want your confirmation before reading too much into it. Questions: 1. With journal-content: none, does IXFR apply trigger a full in-memory tree walk of the QP-trie, rather than an isolated incremental record-level update? If so, is that a necessary consequence of running without a journal to maintain state? 2. For a secondary with no NSEC/NSEC3, no wildcards or any downstream IXFR'ing, could a "lightweight secondary" mode bypass post-apply bookkeeping that might only be targetted to primaries and signers? 3. Could it rewalk only subtrees where adds or removes happen to their ancestors, rather than the full zone? If NSEC is absent, is the prev pointer chain actually used at query time, or can it be skipped entirely? Our use case is secondary-only, with large zones and high frequency updates. We're hoping there is something on the configuration or roadmap side that might help, and ultimately not sure if we're just bumping up against a realistic constraint. Thanks for the great software btw, loving it. Thanks!

7 měsíců, 2 týdny

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How to trigger catalog zone generation

by Billiam Crashkopf

Hi all, I just set up catalog zones for the first time. I'm using a conf file with my list of zones. After creating a catalog zone and adding member zones to it, I executed 'knotc reload'. The catalog zone then appeared in the output of 'zone-status', and member zones were listed with the catalog zone name. However, 'zone-read <catalog.zone>' showed no PTR records. I tried 'zone-reload <catalog.zone>', updated serials on the member zones and such, but the catalog zone remained empty until knotd was restarted. I saw this behavior on both 3.4.4 and 3.5.2. Is this the intended behavior? Is there a way to generate the catalog without restarting knotd? Thanks in advance, Bill

9 měsíců

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Knot DNS 3.5.3 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.3! This version brings some improvements and a few bug fixes. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.3/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

9 měsíců, 2 týdny

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[help] about zone transfer via QUIC

by SUN Guonian

Greetings, I have tried to use QUIC in zone transfering, I met one error in on bigger zone, from master's log, it displayed, 2026-01-04T17:32:19+0800 debug: [foo.] ACL, allowed, action transfer, remote 10.0.0.147@60880 QUIC cert-key xJKsDkUqpl6orXeTwsrDgDvgZ/PiYxOSVlOkVdn5EOU= 2026-01-04T17:32:19+0800 info: [foo.] IXFR, outgoing, remote 10.0.0.147@60880 QUIC, incomplete history, serial 2026010403, fallback to AXFR 2026-01-04T17:32:19+0800 debug: [foo.] ACL, allowed, action transfer, remote 10.0.0.147@60880 QUIC cert-key xJKsDkUqpl6orXeTwsrDgDvgZ/PiYxOSVlOkVdn5EOU= 2026-01-04T17:32:19+0800 info: [foo.] AXFR, outgoing, remote 10.0.0.147@60880 QUIC, started, serial 2026010404 2026-01-04T17:32:20+0800 info: [foo.] AXFR, outgoing, remote 10.0.0.147@60880 QUIC, buffering finished, 0.87 seconds, 7390 messages, 124493148 bytes 2026-01-04T17:32:20+0800 notice: QUIC, terminated connections, outbuf limit 1 on the slave side, I got log as, 2026-01-04T17:32:18+0800 info: [foo.] zone file loaded, serial 2026010403 2026-01-04T17:32:19+0800 info: [foo.] loaded, serial none -> 2026010403, 92000117 bytes 2026-01-04T17:32:19+0800 info: [foo.] refresh, remote 10.0.0.151@853, remote serial 2026010404, zone is outdated 2026-01-04T17:32:19+0800 info: server started (and, the knotd on slave will down without log.) Thanks in advance. My testing environment is, the zone size is 1,000,000 x ( 2 NS + 2 A ), such as, domain00000000 3600 NS ns1.domain00000000 3600 NS ns2.domain00000000 ns1.domain00000000 3600 A 10.0.0.1 ns2.domain00000000 3600 A 10.0.0.2 ... domain00999999 3600 NS ns1.domain00999999 3600 NS ns2.domain00999999 ns1.domain00999999 3600 A 10.0.0.1 ns2.domain00999999 3600 A 10.0.0.2 If I decrease the record number to 500,000 x ( 2 NS + 2 A ), the zone could be transfer with QUIC successfully. For traditional TCP and TLS, the zone transfer is processed without error, even for more large size. Version in master and slave are both 3.5.2, installed from copr. OS in both side is Rocky9 x86_64. Best Regards, SUN Guonian

9 měsíců, 3 týdny

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Usage about notify, how to define notify behaviour

by SUN Guonian

Greetings, If I do not configure a "notify" statement in the zone section, I notice that Knot DNS still sends NOTIFY messages to all servers in the NS records. How can I disable NOTIFY messages on a server that is at the end of the zone transfer link (e.g., a stealth or receiving-only secondary)? Best Regards, SUN Guonian

10 měsíců

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TCP Fast Open deprecation

by Daniel Salzman

Hello Knot DNS users, Knot DNS supports TCP Fast Open (when configured) in both the server and client roles for several years. However, we have not observed any performance or other improvements from this technology so far. Since removing it would simplify the code, I'm considering dropping the support for it. Is there anyone who would miss TFO in Knot DNS? For better XFR efficiency between Knots, https://www.knot-dns.cz/docs/latest/singlehtml/index.html#remote-pool-limit works much better. Thanks, Daniel

10 měsíců, 3 týdny

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zone-ksk-submitted

by Einar Bjarni Halldórsson

Greetings, One thing I’m not sure about is exactly what happens when we run `knotc zone-ksk-submitted`? Our parent zones don’t support CDS/CDNSKEY, so we manually update DS records and then run `knotc zone-ksk-submitted`. It seems to me that as soon as we run it, the retiring of the outgoing KSK key starts and it’s removed from the DNSKEY RRset. Is that correct? I’d like to be sure, because as it is, I wait at least the TTL of the DS record before running zone-ksk-submitted, if I run it right away and knot removes the key immediately from the DNSKEY RRset, then caching resolvers will invalidate the zone. The docs for knotc say: Use when the zone's KSK rollover is in submission phase. By calling this command the user confirms manually that the parent zone contains DS record for the new KSK in submission phase and the old KSK can be retired. (#) Reading the docs, I would think I should run zone-ksk-submitted as soon as the new DS record has been published in the parent, but then knot would need to know to wait for the TTL of the DS record before removing the key. Should I wait before running zone-ksk-submitted, or is there a config option I’m missing to tell knot the ds ttl? .einar

10 měsíců, 3 týdny

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ACL issues

by DiffieHellman

Hi, I'm having issues with ACL's and DNS updates and multiple DNS servers. I use DNS-01 for TLS letsencrypt and AXFR between the servers, but for some reason acme.sh is not working for a new server with "NOTAUTH" failures. (I give acme.sh export KNOT_SERVER='souseiseki.middlendian.com' so that it uses the master and that works fine on the master and another server, but for some reason on the new one there is an ACL related failure?); [Thu 04 Dec 2025 21:53:49 AEDT] Adding _acme-challenge.middlendian.com. 60 TXT "<snip>" ;; ->>HEADER<<- opcode: UPDATE; status: NOTAUTH; id: 42945 ;; Flags: qr; ZONE: 1; PREREQ: 0; UPDATE: 0; ADDITIONAL: 1 ;; ZONE SECTION: ;; middlendian.com. IN SOA ;; ADDITIONAL DATA: ;; TSIG PSEUDOSECTION: acme_key. 0 ANY TSIG hmac-sha512. 1764845629 300 64 <snip> 42945 NOERROR 0 ;; ERROR: update failed with error 'NOTAUTH' knsupdate works with the set key to the master; knsupdate knsupdate> server souseiseki.middlendian.com knsupdate> key hmac-sha512:acme_key:<snip> knsupdate> zone middlendian.com. knsupdate> add test.middlendian.com. 300 TXT test knsupdate> send knsupdate> answer But, the ACL seems to have problems, as DNS updates fail if attempted via any secondary server?; knsupdate knsupdate> server hinaichigo.middlendian.com knsupdate> key hmac-sha512:acme_key:<snip> knsupdate> zone middlendian.com. knsupdate> del test.middlendian.com TXT knsupdate> send ;; ->>HEADER<<- opcode: UPDATE; status: NOTAUTH; id: 14970 ;; Flags: qr; ZONE: 1; PREREQ: 0; UPDATE: 0; ADDITIONAL: 1 ;; ZONE SECTION: ;; middlendian.com. IN SOA ;; ADDITIONAL DATA: ;; TSIG PSEUDOSECTION: acme_key. 0 ANY TSIG hmac-sha512. 1764844872 300 64 <snip> 14970 NOERROR 0 ;; ERROR: update failed with error 'NOTAUTH' Knot on souseiseki outputs an error to syslog; "ACL, denied, action update, remote 125.63.60.124@38966 TCP" but that isn't helpful debug output, as it does not say why the ACL was denied. IP address related matching could be a problem, but reviewing the documentation, it seems to state that IP addresses are not considered in ACL's unless listed in the ACL? Does anyone know what the issue is and otherwise how do I debug it? All the servers have the same ACL key set; /etc/knot/acme.key; key: - id: acme_key algorithm: hmac-sha512 secret: <snip> souseiseki (master); remote: - id: suigintou address: [ 180.150.27.133@53, 2403:5806:e8d0::dead:beef:cafe@53 ] - id: hinaichigo address: 125.63.60.124@53 include: "/etc/knot/acme.key" acl: - id: acme_acl key: acme_key action: update zone: - domain: middlendian.com dnssec-signing: on acl: acme_acl notify: [ suigintou, hinaichigo ] hinaichigo (secondary); remote: - id: master address: 144.6.197.157@53 acl: - id: acme_acl key: acme_key action: [update, notify] zone: - domain: middlendian.com master: master acl: acme_acl -- Kind Regards, DiffieHellman

10 měsíců, 4 týdny

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restore, key copy failed (already exists)

by Einar Bjarni Halldórsson

Hi, In our setup, we have one active signer and one backup signer. Both use softhsm, but only the active signer does automatic key management. There is an hourly cron job that syncs keys from active to backup signer. It runs knotc zone-backup on the active signer, only backing up the kaspdb. It then syncs the files over to the secondary and runs knotc zone-restore. This has been running for a few years now without problems. These last two weeks we’ve been performing algorithm rollovers for some of our zones, and after we run `knotc zone-ksk-submitted nic.is` we start seeing these errors when the zone-restore is run on the backup: error: [nic.is.] zone event 'backup/restore' failed (already exists) warning: [nic.is.] zone restore failed (already exists) warning: [nic.is.] restore, key copy failed (already exists) I searched the knot dns source code, but couldn't find where these errors are output. Like I said, we’ve been running like this for a few years, doing regular ZSK rollovers, and a few KSK rollovers, without problems. There’s something about the algorithm rollover that causes this problem with our setup. I assume I can just delete the keys on the secondary and sync again, but I want to understand what causes these errors so we can avoid them or at best document them in our process. .einar

11 měsíců

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Knot DNS 3.5.2 and 3.4.9 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.2. This is a bug fix version with some improvements. Version 3.4.9 backports several bug fixes. Note that the previous Debian repositories https://deb.knot-dns.cz/knot-latest/ and https://deb.knot-dns.cz/knot/ will no longer be updated and you should use https://pkg.labs.nic.cz/ instead. Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.2/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.4.9/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

11 měsíců

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cache problem

by Randy Bush

debian 12 knot 5 so i believe i have a server with antique data in cache. the net of a million lies says use `kresctl clear foo` but i can not find kresctl. clue bat please randy

11 měsíců, 2 týdny

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pkcs11 broken after upgrade to trixie

by Bastien Durel

Hello, I upgraded my signing server to Debian 13, but I have a problem with my HSM : Oct 15 21:09:18 arrakeen knotd[29552]: error: [durel.org.] zone event 'load' failed (PKCS #11 token not available) Oct 15 21:09:18 arrakeen knotd[29552]: error: [geekwu.org.] zone event 'load' failed (PKCS #11 token not available) keymgr gives me the same error : # keymgr geekwu.org list error: failed to initialize KASP (PKCS #11 token not available) despite hsmwiz being able to access the key : # hsmwiz identify Using reader with a card: Nitrokey Nitrokey HSM (DENK01067960000 ) 00 00 Version : 3.4 Config options : User PIN reset with SO-PIN enabled SO-PIN tries left : 15 User PIN tries left : 3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Default SO-PIN: 3537363231383830 Default PIN: 648219 Now executing: pkcs15-tool --dump Using reader with a card: Nitrokey Nitrokey HSM (DENK01067960000 ) 00 00 PKCS#15 Card [knot]: Version : 0 Serial number : DENK0106796 Manufacturer ID: www.CardContact.de Flags : PRN generation[...] Public EC Key [Private Key] Object Flags : [0x00] Usage : [0x140], verify, derive Access Flags : [0x02], extract FieldLength : 384 Key ref : 0 (0x00) Native : no ID : 74f59bc17317bfccc5806108d84df1abd275faef DirectValue : <present> Knot is using this keystore : keystore: - id: nitrokey backend: pkcs11 config: "pkcs11:pin-value=*** /usr/lib/x86_64-linux-gnu/opensc-pkcs11.so" I verified /usr/lib/x86_64-linux-gnu/opensc-pkcs11.so still exists, and ldd doesn't report any missing dependency strace let me see communication with pcscd, whose logs have these : Oct 15 21:20:14 arrakeen systemd[1]: Started pcscd.service - PC/SC Smart Card Daemon. Oct 15 21:20:20 arrakeen pcscd[33186]: 00000000 ../src/auth.c:166:IsClientAuthorized() Process 33204 (user: 134) is NOT authorized for action: access_pcsc Oct 15 21:20:20 arrakeen pcscd[33186]: 00000071 ../src/winscard_svc.c:357:ContextThread() Rejected unauthorized PC/SC client After a bit of digging, I found it's controlled by polkit, and added a brutal rule : cat /etc/polkit-1/rules.d/pcsc.rules /* -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*- */ polkit.addRule(function(action, subject) { if (subject.isInGroup("pcsc")) { return polkit.Result.YES; } }) with knot added to the pcsc group, it can access the HSM again. Do you know of a better way to configure ? NB: I'm using another account, as I began to write this with no DNS server running Regards, -- Bastien Durel

1 rok

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Knot DNS 3.5.1 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.1! This is mostly a bugfix version. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.0/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok

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knot 3.5.0 conf-set include not working correctly

by Robert Mueller

Hi We recently tried to upgrade to knot 3.5.0, but ran into a problem. It appears zones added via `conf-set include` are not working until knot is reloaded. So to reduce calls to knotc when inserting a number of domains, we build a config fragment and then use `knotc conf-set include fragment.conf` to load it With 3.4.8 this worked fine. For example: # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock status version 3.4.8 # dig +short foo.com @10.37.129.215 SOA # cat > /local/knot_dns/zones/foo.com.zone <<EOF foo.com. 3600 IN SOA ( ns1.fastmaildev.com. postmaster.fastmaildev.com. 2025091802 ;serial 86133 ;refresh 600 ;retry 1209600 ;expire 3600 ;minimum ) foo.com. 3600 IN NS ns1.fastmaildev.com. foo.com. 3600 IN NS ns2.fastmaildev.com. EOF # cat > /tmp/zone.conf <<EOF zone: - domain: foo.com template: "default" EOF # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock conf-begin OK # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock conf-set include /tmp/zone.conf OK # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock conf-commit OK # dig +short foo.com @10.37.129.215 SOA ns1.fastmaildev.com. postmaster.fastmaildev.com. 2025091802 86133 600 1209600 3600 As you can see, immediately after the `conf-commit`, the zone can be queried via dig. However this doesn't work in 3.5.0. # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock status version 3.5.0 # dig +short foo2.com @10.37.129.215 SOA # cat > /local/knot_dns/zones/foo2.com.zone <<EOF foo2.com. 3600 IN SOA ( ns1.fastmaildev.com. postmaster.fastmaildev.com. 2025091802 ;serial 86133 ;refresh 600 ;retry 1209600 ;expire 3600 ;minimum ) foo2.com. 3600 IN NS ns1.fastmaildev.com. foo2.com. 3600 IN NS ns2.fastmaildev.com. EOF # cat > /tmp/zone.conf <<EOF zone: - domain: foo2.com template: "default" EOF # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock conf-begin OK # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock conf-set include /tmp/zone.conf OK # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock conf-commit OK # dig +short foo2.com @10.37.129.215 SOA # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock zone-status foo2.com error: [foo2.com] (no such zone found) # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock zone-reload foo2.com error: [foo2.com] (no such zone found) # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock zone-check foo2.com # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock reload Reloaded # dig +short foo2.com @10.37.129.215 SOA ns1.fastmaildev.com. postmaster.fastmaildev.com. 2025091802 86133 600 1209600 3600 # /opt/knot/sbin/knotc -C /local/knot_dns/conf/ -s /run/knot_dns/knot_dns.sock zone-status foo2.com [foo2.com.] role: master | serial: 2025091802 As you can see, after the `conf-commit` the zone isn't visible in knot at all, either via dig or even via knotc commands `zone-status` or `zone-reload`. However immediately after a knot server `reload`, it does become visible. This feels like a bug and regression in 3.5.0 to me, or am I holding something wrong? Rob Mueller robm(a)fastmail.com

1 rok

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Knot DNS 3.5.0 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.5.0! This version introduces support for a database zone backend using Redis/Valkey, external zone validation, multiple control sockets, various optimizations, and much more. See the changelog. Today Knot DNS 3.3 has reached its end of life! Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.5.0/NEWS Migration: https://www.knot-dns.cz/docs/latest/html/migration.html#upgrade-3-4-x-to-3-… Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 1 měsíc

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Re: Catalog zones when secondary to other servers

by Chris Wopat

I am definitely interested in examples! Reading up on groups, is it that 'group A' may represent 'customer A' and have a specific set of Primary/Master nameservers, Group B == Customer B, different Primary, and so on? (also fixed to be plain text - hope this is more legible in the archives) --Chris

1 rok, 2 měsíce

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Catalog zones when secondary to other servers

by Chris Wopat

Hello DNS people, I am exploring migrating from PowerDNS where we have a hidden primary (ns0) and two public resolvers (ns1/ns2) using SQL replication, to instead use Knot DNS for ns1/ns2 and Catalog zones to update them. ns0 would remain Powerdns (frontend, zone edits for customers, etc). We are looking at changing due to performance issues - "dns water torture" or "random subdomain attacks" or whatever we're calling this these days. Our test environment is more or less setup as listed here: * https://nick.bouwhuis.net/posts/2024-12-31-catalog-zones-powerdns-knot/ This is similar to the architectured listed here: * https://indico.dns-oarc.net/event/47/contributions/1008/attachments/963/185… (Klaus from nic.at) For some zones, we're secondary to a customer's zone. In this case the Primariy IPs are listed in PowerDNS metadata. I am trying to wrap my head around how this could work seamlessly, where we keep the same workflow - add the zone to PowerDNS, then it gets replicated with catalog zone to ns1/ns2 (knot). Does anyone have this working? Secondary is mentioned in the PDF above but no details about that are listed. The issues appear to be at least these two things: 1) How to tell ns1/ns2 (knot) which IP's are its primaries in these zones? The only thing I can think of is a separate script to generate a knot config file with this info - effectively the same as "back in the day" with BIND. This completely negates the function of catalog zones that are secondaries. rfc9432 does address this: "Catalog zones on secondary name servers would have to be set up manually, perhaps as static configuration, similar to how ordinary DNS zones are configured when catalog zones or another automatic configuration mechanism are not in place. " That RFC then says you still have to keep it in the catalog anyhow - it's not immediately clear to me how/why - and how it could be configured per the lasts sentence (manually in knot conf) as well as in the catalog - wouldn't this be two declarations of the same zone? "Additionally, the secondary needs to be configured as a catalog consumer for the catalog zone to enable processing of the member zones in the catalog, such as automatic synchronization of the member zones for secondary service" 2) How would NOTIFY work? our hidden ns0 (powerdns) runs a copy of the zones, but ns1/ns2 would be notified from the actual primary, and our ns0 would become out of date. Does knot have something like also-notify to always notify that server? This may or may not be a problem, but the zone data would completely become stale without this. Some customers log into our web portal to view records of their secondaries and expect them to match. If anyone has operational experience with this or just a big cluebat to hit me with - let me know. Cheers, Chris

1 rok, 3 měsíce

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Slow performance adding or deleting zones with large-ish (>480k) zones database

by robm＠fastmail.com

Hi We're noticing that as our list of zones gets larger (about 480k right now), adding a new zone or deleting an existing zone seems to continue to get slower. We are always doing our modifications as part of a transaction, and the time appears to occur in the commit phase. An example timing. # time /opt/knot/sbin/knotc ... conf-begin OK real 0m0.010s user 0m0.000s sys 0m0.010s # time /opt/knot/sbin/knotc ... conf-unset zone.domain example.com OK real 0m0.010s user 0m0.000s sys 0m0.010s # time /opt/knot/sbin/knotc ... conf-commit OK real 0m2.330s user 0m0.000s sys 0m0.009s # As you can see, it took > 2 seconds to commit the transaction that removes just the example.com zone. Similarly, it takes > 2 seconds to commit the transaction that adds the zone back. Given the time is real time and not sys/user, I presume knotc is waiting on knotd to complete the work. I used perf to record a CPU profile of knotd while the commit was running, but nothing hugely stuck out at me. 10.75% knotd libc.so.6 [.] __memcmp_avx2_movbe ◆ 6.03% knotd knotd [.] __popcountdi2 ▒ 5.89% knotd knotd [.] ns_first_leaf ▒ 5.25% knotd libc.so.6 [.] pthread_mutex_lock@@GLIBC_2.2.5 ▒ 3.85% knotd liblmdb.so.0.0.0 [.] 0x0000000000003706 ▒ 3.72% knotd knotd [.] ns_find_branch.part.0 ▒ 2.76% knotd knotd [.] trie_get_try ▒ 2.63% knotd liblmdb.so.0.0.0 [.] 0x00000000000069d2 ▒ 2.34% knotd libknot.so.14.0.0 [.] knot_dname_lf ▒ 1.92% knotd liblmdb.so.0.0.0 [.] mdb_cursor_get ▒ 1.72% knotd knotd [.] create_zonedb ▒ 1.68% knotd knotd [.] twigbit.isra.0 ▒ 1.68% knotd knotd [.] catalogs_generate ▒ 1.36% knotd knotd [.] twigoff.isra.0 ▒ 1.28% knotd knotd [.] hastwig.isra.0 ▒ 1.28% knotd knotd [.] db_code ▒ 1.27% knotd libknot.so.14.0.0 [.] find_item ▒ 1.11% knotd libknot.so.14.0.0 [.] knot_dname_size ▒ 1.04% knotd knotd [.] zonedb_reload ▒ 0.99% knotd libc.so.6 [.] _int_free ▒ 0.99% knotd liblmdb.so.0.0.0 [.] 0x0000000000003ce8 ▒ 0.96% knotd liblmdb.so.0.0.0 [.] memcmp@plt ▒ 0.95% knotd liblmdb.so.0.0.0 [.] mdb_cursor_open ▒ 0.88% knotd libc.so.6 [.] malloc ▒ 0.88% knotd knotd [.] conf_db_get ▒ 0.87% knotd knotd [.] ns_next_leaf ▒ 0.82% knotd libknot.so.14.0.0 [.] iter_set ▒ 0.75% knotd knotd [.] evsched_cancel ▒ 0.73% knotd libknot.so.14.0.0 [.] find ▒ ... Our config is pretty simple, conf-export looks like: server: rundir: "/local/knot_dns/run/" user: "nobody" pidfile: "/local/knot_dns/run/knot.pid" listen: [ ... ] log: - target: "syslog" any: "info" statistics: timer: "10" file: "/tmpfs/knot_dns_stats.yaml" database: storage: "/local/knot_dns/data" mod-stats: - id: "default" request-protocol: "on" server-operation: "on" request-bytes: "on" response-bytes: "on" edns-presence: "on" flag-presence: "on" response-code: "on" request-edns-option: "on" response-edns-option: "on" reply-nodata: "on" query-type: "on" query-size: "on" reply-size: "on" template: - id: "default" global-module: "mod-stats/default" storage: "/local/knot_dns/zones/" zone: - domain: "example.com." template: "default" ... 478,000 more domains all the same ... Current files on disk are: # ls -l /local/knot_dns/data/* /local/knot_dns/data/catalog: total 0 /local/knot_dns/data/journal: total 0 /local/knot_dns/data/keys: total 0 /local/knot_dns/data/timers: total 75880 -rw-rw---- 1 root root 77697024 Jun 24 09:26 data.mdb -rw-rw---- 1 root root 2432 Jul 17 01:05 lock.mdb /local/knot_dns/data/timing: total 0 This machine is not slow or constrained in any way. It's 24 core, 3.6Ghz, 64Gb, NVMe drives, etc. Load is very low (<1) with plenty of free resources. So what I'm wondering is: 1. Is this normal? It doesn't feel right that adding/removing a single domain takes > 2 seconds regardless of the size of the existing zone database 2. Is there any way to improve this? Doing multiple adds/deletes at once within a transaction works and we do that where we can, but there are cases where we can't do that and I'd really like to understand why this is as slow as it is. Thanks in advance Rob

1 rok, 3 měsíce

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Knot DNS 3.4.8 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.8! This is a maintenance version with some improvements. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.8 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 3 měsíce

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Knot Resolver 6.X : split config.yaml in several files ?

by Stéphane Paillet

Hello, I'm not sure I'm posting in the right place. Don't hesitate to tell me if it's not. I began to test the use of Knot Resolver 6.x for a future project (deploying a DNS resolver with blocked domains lists). I would like to know if it's possible to split the config.yaml in several files (the main config in one file, acl and views section in another, data-local section with rpz lists and tags to rely acl lists to blocklists in another), and if the answer is yes, how can I do ? Thank you for your help. Regards, Stephane

1 rok, 4 měsíce

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KDIG RFC 4892 Chaos query

by lathama＠gmail.com

I ultimately found that I needed to use a CH in KDIG but wonder how I/We could update the documentation or add an alias for chaos. Working Example: dig +short @<dns server> version.bind chaos txt dig +short @<dns server> version.bind CH txt kdig +short @<dns server> version.bind CH txt Problem Example: kdig +short @<dns server> version.bind chaos txt I had to read source code to find the answer in a speedy timeframe.

1 rok, 4 měsíce

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Knot DNS 3.4.7 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.7! This is mostly a feature version wit some bugfixes. Note that Ubuntu 20.04 is EOL, and Launchpad no longer builds packages for it. Therefore, we no longer provide updated packages for this version either. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.7 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 4 měsíce

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Signing Benchmark

by Thomas Küchenthal

Hi, for benchmark purpose I need to find out how log it takes to sign zone files in different sizes with different hardware. What is the best way to find out the exact time the signing process takes? Thanks! BR Thomas

1 rok, 5 měsíců

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zone event 're-sign' failed (not enough space provided)

by Thomas Küchenthal

Hi, when signing a zone file I receive this error in the log: "zone event 're-sign' failed (not enough space provided)" Can you tell me what is the limiting factor here? Thanks! BR Thomas

1 rok, 5 měsíců

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Trigger zone transfer from the master that sent NOTIFY

by Alexandr Basov

Hello, Could you please clarify whether Knot can perform a zone transfer not from the first master listed, but from the one that sent the NOTIFY? The masters are configured in the following order: remote: - id: master address: [ "192.168.58.151", "192.168.58.134" ] When a NOTIFY is sent from |192.168.58.134|, the zone transfer is still performed from |192.168.58.151|. Here are the relevant log entries: Apr 25 19:09:25 ubuntu knotd[2065]: info: [chacha.com.] notify, incoming, remote 192.168.58.134@32888 TCP, serial 2006 Apr 25 19:09:25 ubuntu knotd[2065]: info: [chacha.com.] refresh, remote 192.168.58.151@53, remote serial 2006, zone is outdated Apr 25 19:09:25 ubuntu knotd[2065]: info: [chacha.com.] IXFR, incoming, remote 192.168.58.151@53 TCP, receiving AXFR-style IXFR Apr 25 19:09:25 ubuntu knotd[2065]: info: [chacha.com.] AXFR, incoming, remote 192.168.58.151@53 TCP, started Thank you for your product and for your help! *Best regards,* *A.A. Basov*

1 rok, 6 měsíců

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CDS/CDNSKEY issue

by Michael Grimm

Hi, this happened to me for the second time, that https://dnsviz.net <https://dnsviz.net/> tells me: | enfer-du-nord.net/CDNSKEY: The CDNSKEY RRset must be signed with a key that is represented in both the | current DNSKEY and the current DS RRset. See RFC 7344, Sec. 4.1. | enfer-du-nord.net/CDS: The CDS RRset must be signed with a key that is represented in both the current | DNSKEY and the current DS RRset. See RFC 7344, Sec. 4.1. I do not understand what that means. #) I haven't modified my KSK for some time now #) I did notify my parent zone about a modified list of nameservers (via registrar's web portal) I am not absolutely sure if the latter is the cause for these error messages. I 'fixed' that issue by re-uploading my unmodified KSK DNSKEY (via registrar's web portal). Hmm, how can I fix that issue the right way? Any hints are highly welcome, Michael

1 rok, 6 měsíců

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What is mod-synthrecord used for?

by Michael Grimm

Hi, given the case that a ip6/xy block might be delegated to me by my ISP, I began investigating Knot DNS' functionality with regard to ip6.arpa. Hereby I stumbled over the module synthrecord and do not really understand what it is used for. From https://www.knot-dns.cz/docs/3.4/singlehtml/index.html#synthrecord-automati… "Records are synthesized only if the query can't be satisfied from the zone." Please excuse my ignorance, but why would/should/must one return something else than the following for hosts not in the zone? kbn> host 2001:dead:beef::1 Host 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.e.e.b.d.a.e.d.1.0.0.2.ip6.arpa not found: 3(NXDOMAIN) Any feedback is highly appreciated, thanks. Regards, Michael

1 rok, 6 měsíců

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Seperate config for zones

by Einar Bjarni Halldórsson

Hi, This is just a possible feature request. We’re planning on using Knot for user hosted domains. To do that we’ll have to add and remove zones dynamically, so we’ve enabled the config db. What surprised us is that this means that the config file isn’t used at all anymore (except you can use it to prime the config db). As it is, we’ll have to embrace the config db, which makes our ansible playbook more complicated. It’s easy to add a config file template in ansible, it’s more complicated to issue `knotc conf-begin; knotc conf-set; knotc conf-commit` logic. I wish knot was more like nsd, where you have the config file nsd.conf, but if you add zones with `nsd-control addzone ….` it gets added to a seperate zonelist file, which nsd reads on startup. It means we can have a static config file, but still be able to add and delete zones dynamically. nsd doesn’t have automatic DNSSEC key management and catalog zones in knot are really easy to use, which is why we’re going with knot for this project. I just wanted to lay it out there as an idea for the future :) .einar

1 rok, 6 měsíců

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Knot DNS 3.4.6 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.6! This is a bugfix version. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.6 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 6 měsíců

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Re: Configuration database vs file questions

by Daniel Salzman

Hi Bill, You can't mix a configuration database and a configuration file. You can initialize a database with `knotc conf-init` or `knotc conf-import`. Then if you start knotd, the database will be used for reading and persistent writing. The configuration database format is a custom format using LMDB. It's not intended to be accessed externally! Daniel On 3/29/25 19:56, Billiam Crashkopf wrote: > Hi all, > > I'm running Knot 3.4.4 on FreeBSD 14.2, installed from the distribution package repository. > > I'm trying to understand, is there a way to configure knotd using both the configuration file and the database? For example, can I use the configuration file for directives like listen and template, then use the configuration database for storing individual zone settings? So far, it appears that knotd only uses one or the other. Furthermore, there doesn't seem to be any command to explicitly load or flush configuration from the database. If I start with the config file, I can initialize the database, but upon stopping knotd nothing seems to be saved to the database. I also don't see any documentation on tooling to inspect the database on disk. What is the file format of the database? > > If anybody can help me to know more about how it works I would be most appreciative. > > Thanks, > > Bill >

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HSM keystore-bench

by Jan-Piet Mens

Hello! In July 2024, in the Knot-DNS 3.3.8 release message, Daniel writes: >I would like to ask users with hardware HSMs to send us the output of `keymgr <hsm_keystore_id> keystore-test` >This will allow us to update https://www.knot-dns.cz/docs/latest/html/appendices.html#compatible-pkcs-11… We're now running Knot 3.4.4 against a Thales HSM (I have no details of the actual device/model in use at this time) and I see the following data: $ keymgr -c etc/knot.conf thales keystore-bench Keystore id 'thales', type PKCS #11, threads 1 Algorithm Sigs/sec RSASHA256 33 ECDSAP256SHA256 27 ED25519 n/a ED448 n/a My first reaction was "hmm, that's slow". Is there a list (above URL isn't it) of comparable results which I could show the HSM operators and/or is anybody willing to share their data? Thanks & regards, -JP

1 rok, 7 měsíců

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Knot DNS 3.4.5 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.5! This is mostly a feature release. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.5 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 7 měsíců

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Re: Knot compliance with

by Henry Birge-Lee

Hi Vladimir, I appreciate your response and it's great to know you validate by default. I apologize for posting to the wrong list. Best, Henry On Wed, Mar 12, 2025 at 9:14 AM Vladimír Čunát <vladimir.cunat(a)nic.cz> wrote: > Hello. > On 10/03/2025 17.01, birgelee--- via knot-dns-users wrote: > > This ballot requires compliance with RFCs 4035 (specifically an implementation of a "security-aware" resolver as defined in Section 4) and 6840. To the best of my knowledge Knot would be a viable choice for conforming to this ballot particularly since there is a reference to RFCs 4035 in the config documentation and 6840 implements several key features of modern DNSSEC. Given the need for documentable compliance by CAs, a statement of intended support from the Knot team would be extremely helpful. > > This is about resolvers apparently, so we're slightly off-topic here, as > we have a split knot-resolver-users(a)lists.nic.cz - but I expect this > thread to be very short. > > Knot Resolver *does support* modern DNSSEC validation, as described in RFC > 4035, 6840, and some others. And we validate by default, etc. > > --Vladimir >

1 rok, 7 měsíců

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Knot compliance with

by birgelee＠princeton.edu

Hi all, I know this topic has been dead for a bit, but I did want to specifically find out if Knot is intended to be compliant with DNSSEC RFCs 4035 and 6840. I ask because I am computer security researcher and I do a lot of work with the CA/Browser Froum. I recently proposed a draft ballot that would mandate all publicly-trusted web CAs validate DNSSEC: https://github.com/cabforum/servercert/pull/571 This ballot requires compliance with RFCs 4035 (specifically an implementation of a "security-aware" resolver as defined in Section 4) and 6840. To the best of my knowledge Knot would be a viable choice for conforming to this ballot particularly since there is a reference to RFCs 4035 in the config documentation and 6840 implements several key features of modern DNSSEC. Given the need for documentable compliance by CAs, a statement of intended support from the Knot team would be extremely helpful. Best, Henry https://henrybirgelee.com/

1 rok, 7 měsíců

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mod-rrl

by Randy Bush

is there any guidance on using mod-rrl on a public server with a moderate load, say 6kqps? we have rtfm, and remain unsure of what we are doing. we want cookies, and therefore need to turn rrl on. but with it turned on, we seem to drop a *lot* of replies, a lot. mod-rrl: - id: default rate-limit: 200 slip: 2 randy

1 rok, 7 měsíců

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IXFR versions journaling without using file

by Jeremy C. Reed

I have static zones that are regenerated continually (every few seconds) with a knotc zone-reload _zonename_ after. Doing dig queries using ixfr= always used AXFR until I enabled per-zone zonefile-load: difference We saw logs periodically like: warning: [foo.bar.example.com.] failed to update zone file (operation not permitted) This is because the files created are a different user than the knotd. We are not doing automated signing nor dynamic updates. This is with Knot 3.2.6. 1) Why would it try writing to the source zone file? Anyways, we got rid of that warning with zonefile-sync: -1 And the time to between the zone-reload and serving the new zone data improved too. I noticed with experimenting with journal-db-max-size and journal-max-size the data.mdb was around 80% larger than the defined size. As I removed and added records, the number of differences reduced and I couldn't do IXFRs for many versions behind which I assume is default journal-max-depth: 20. I believe this means the journaling was dropping versions and does not require keeping at least 20 versions (not a "minimum". I am fine with that. I was able to trigger error like error: [foo.bar.example.com.] zone event 'load' failed (not enough space provided) which I assume was due to journaling even when dropping old versions still doesn't have enough space for most recent changes. We are experimenting with increasing journal-max-size to work around this. It appears that the differences are fully handled in memory first before updating to the journal file. I also see the journal file have large jump in file size and never small increments. 2) Since I have no purpose to reuse a journal file for system restart or recovery -- since I am building new zone files frequently, is there any way to not use a journal file and just have knotd do this all in memory? That way it is never writing to the journal every few seconds while I continue to offer IXFR out support? If not, maybe I will use memory file system for the journal files. By the way, this is for around ten zones varying from around 1000 records to over 8 million records for the larger zones, They are changing from a few records every few seconds to maybe a thousand records every 30 seconds. Thanks

1 rok, 7 měsíců

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IXFR response has interspersed IXFR and OPT records and more

by Jeremy C. Reed

I am testing IXFR for servers I did not install nor have easy access to. version.server. says it is 3.2.6. I know there are IXFR changes since then per the NEWS file and from git log. I don't see same behavior on my different version different systems but they are also configured differently. The knot.conf zones are not configured with "zonefile-load: difference" and the response effectively has the entire zone as if was AXFR and not the changes. If I pass the IXFR SOA SERIAL to latest it has no changes (answer has has the SOA only with same serial). I used dnspython to output the response from doing IXFR queries (IXFR question with SOA authoritative set with the serial in the query). I noticed the output abruptly stops when "dig" doesn't stop. So I used tcpdump many times to compare knot, named, and my other knot. I found an odd behavior in this knot 3.2.6 response which dig ignores and my dnspython fails. After the expect record it has 1) OPT record with the requestors pay load size (class 1232) and edns rcode and flags (all zeros ttl), then 00 rdlength and 00 rdata field. 2) then 28 bytes I don't understand such as: 40 11be dc80 0000 0101 fa00 0000 01 or 40 20be dc80 0000 0102 0300 0000 01 or 40 0fe1 6a81 0000 0102 0500 0000 00 or 12 8de1 6a81 0000 0100 9200 0000 00 3) then an IXFR record following other labels ... 0363 6f6d 00 three characters "com" and end of domain 00 fb IXFR record type 00 01 INternet class and then ends there, with NO ttl, rdlength, nor rdata. 4) followed by next label length, label ... etc with rrtype, class, ttl, rdlength, rdata and so on. This odd OPT, bytes I don't know, partial/broken IXFR record, may be repeated a few times. I assume these were interspersed where IXFR's SOA records should be. I couldn't find an RFC that suggested using interspersed OPT nor IXFR records. I find it odd that OPT record is in my ANSWER section. I find it odd that the IXFR record is incomplete. And I don't know what the other bytes are in-between. This recognizable to anyone? The IXFR works fine as seen with dig or when I use named as my secondary but I assume the named is ignoring the junk parts too.

1 rok, 8 měsíců

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mod-onlinesign: extra DNSKEY causes double signatures

by Peter Thomassen

Hi, Consider a zonefile with @ DNSKEY 257 3 13 ZAtZvaK2/uVw+LG2AA12Dt/ZZ+YN0IF3pFwjfBp8Jd2DXjVU0cdxfpkY StUdbFu24Js6T5uROHo8lSG9rhgduw== and configuration zone: - domain: example.com storage: /config/ file: example.com.zone module: mod-onlinesign -- Like our community service? 💛 Please consider donating at https://desec.io/ deSEC e.V. Möckernstraße 74 10965 Berlin Germany Vorstandsvorsitz: Nils Wisiol Registergericht: AG Berlin (Charlottenburg) VR 37525

1 rok, 8 měsíců

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Dynamic update fails after zone creation via catalog

by Daniel Gröber

Hi Knots, I use catalog zones to sync the set of zones my (hidden)master and slaves handle. I'm trying to stop messing with zone files on my master, instead switching exclusively to nsupdate (along with Tony Finch's nsdiff). In my testing it seems updating the zone after adding it via a catalog is not possible: $ knotc zone-status dxld.at [dxld.at.] role: master | serial: - | catalog: dxld.catalog. | re-sign: +9D15h6m14s Yet the update fails: $ knsupdate -y $SECRET <<EOF > server ns0.dxld.at. > zone dxld.at. > add dxld.at. 3600 IN SOA ns0.dxld.at. hostmaster.dxld.at. 1 2m 5m 1w 5m > send update failed: SERVFAIL Nothing is logged with `logging: any: debug` except a "ACL, allowed, action update". As soon as I create the zone on the server with zone{-begin,-set,-commit} it starts working ofc. I guess this is just not supported, but is there a good reason? I would find it quite convenient to do all my DNS ops over port 53 without touching ssh ;-) Thanks, --Daniel

1 rok, 8 měsíců

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Issue - trailing data

by Артём Палецкий

Hello! I have an issue. Knot is configured as a secondary server, and when receiving a zone, a "trailing data" error occurs, preventing the zone from being loaded from the primary server. ``` Jan 30 11:03:40 hostname knotd[5407]: info: [domain.com.] refresh, remote 50788646-db98-4caa-b26e-95b30a470796, address 1.2.3.4@53, failed (trailing data) ``` The same warning appears when using the `kdig` utility: ```bash kdig @1.2.3.4 domain.com AXFR > /tmp/domain.com ;; WARNING: malformed reply packet (trailing data) ;; WARNING: malformed reply packet (trailing data) ``` The issue occurs specifically with large zones. If the zone requires 2 messages to be received (e.g., `Received 32720 B (2 messages, 442 records)`), one warning appears. If it requires 3 messages (e.g., `Received 49083 B (3 messages, 878 records)`), two warnings appear. However, if I place this zone (`/tmp/domain.com`) into `/var/lib/knot` and then execute: ```bash knotc reload knotc zone-refresh domain.com ``` Knot successfully loads the zone. Unfortunately, due to confidentiality, I cannot share the contents of the zone. Additionally, I do not have precise information about the software installed on the primary server. However, if BIND is used as the secondary server, there are no issues. A regular `dig` command also does not return any errors. Is there any way to make Knot ignore the "trailing data" error and successfully load the zone? Thank you for your help!

1 rok, 9 měsíců

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Knot DNS 3.4.4 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.4! This is a bugfix version with some improvements. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.4 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 9 měsíců

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knotc issue since 3.4.1

by Jean-Daniel Dupas

Hello, I have an issue with a behaviour change in knot 3.4.1. Before 3.4.1, trying to send a conf-abort command using knotc to knot when there was no pending transaction properly returned an error, but since 3.4.1, instead of receiving an error, the connection hangs, and failed after a timeout. Some digging shows that this is due to a change in commit 69328dd7799253978605f7dac29175945971e63f Instead of returning and error as it should, ctl_process skip the command processing when it does not expect a conf-abort command. Is this a bug, or is this behaviour intended ? Just to give you some context about my use case, I wrote a daemon that is using libknot to sync the dns configuration, and as knot does not supports multiple transaction, it has to make sure there is no dangling transaction before trying to apply changes (in case the daemon did crash while applying a previous change). Until 3.4.1, it did that by simply sending a conf-abort before starting the new transaction. Thanks

1 rok, 9 měsíců

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HSM support

by Thomas Kuechenthal

Hi Guys, a happy new year to all of you! Due to policy reasons we need to make knot use a HSM in the future. Is anybody successfully using some cloud based HSM services like Google Cloud HSM for DNSSEC signing? Any information is helpful, thanks! BR Thomas

1 rok, 9 měsíců

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Knot DNS 3.3.10 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.10! This version backports some fixes and improvements from 3.4. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.10 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 10 měsíců

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Change of default nsec3-salt-length

by Erwan David

Hello, My knot 3.4.3 gives me following notice : notice: config, policy 'rail_policy' depends on default nsec3-salt-length=8, since version 3.5 the default becomes 0 In order to avoid problems when .5 will arrive, I see 2 possibilities: * add an explicit nsec3-salt-length=8 to my policy * add an explicit nsec3-salt-length=0 to my policy and resign the zone. From https://www.ietf.org/archive/id/draft-ietf-dnsop-nsec3-guidance-10.html#nam… I understand that 0 should be the new configuration, but what are the risks (considering eg. DNS caches) if I change the policy of the zone? I only have small zones, with very few dynamic changes, which I can delay for the time of the TTL if needed. -- Erwan David

1 rok, 10 měsíců

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Knot DNS 3.4.3 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.3! This is a bugfix version with some improvements. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.3 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 10 měsíců

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Starting and stopping knotd

by Erik P. Ostlyngen

Hi, I'm running an instance of knotd for testing. It is installed with the official ubuntu debian package from kont-dns.cz. When I start the knot service, using systemctl, it takes a very long time to start up (sometimes 30 min). This seems to be related to the systemd unit which is set to type 'notify', and the fact that knot after starting up wants to re-sign all the zones which needs that before notifying. If I change the type to 'simple' or 'forked' (together with the knotd -d option), the start command returns more immediately. My test system has about 800 zonefiles in it. A large number of them want to be re-signed after each startup. My question is, what is the recommended way to start, stop and restart the server? Also, after starting I cannot find the /run/knot/knot.sock file, which is needed when stopping the service with 'knotc stop'. Knot version: 3.4.1-cznic.1~focal (debian package from knot-dns.cz) OS: Linux 5.4.0/Ubuntu 20.04 Focal amd64. Kind regards, Erik Østlyngen Norid

1 rok, 11 měsíců

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EPEL Packages

by Günther J. Niederwimmer

Hello Daniel, Are the EPEL packages no longer available (?), I'm stuck at 3.3.9. There have been no updates since then. Or can you download the .rpm from somewhere else now? -- mit freundlichen Grüßen / best regards Günther J. Niederwimmer

1 rok, 12 měsíců

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Knot DNS 3.4.2 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.2! This is a bugfix version with a few improvements. Upgrade from 3.4.0 and 3.4.1 is recommended. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.2 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok, 12 měsíců

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Knot DNS 3.4.1 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.1! This is a bugfix version with some new features. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.1 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky

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Knot DNS 3.4.0 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.0! This version brings DNS/XFR over TLS, DDNS over QUIC and TLS, continuous DNSSEC zone validation, XDP improvements, enhanced RRL, partially asynchronous processing of control commands, and more. See the changelog. Today, Knot DNS 3.2 reached its end-of-life! Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.4.0/NEWS Migration: https://www.knot-dns.cz/docs/latest/html/migration.html#upgrade-3-3-x-to-3-… Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 1 měsíc

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Deny dynamic updates for certain owners/names

by Conrad Hoffmann

Hi all, we are using dynamic updates for solving ACME challenges. My goal is to restrict the key used for this as much as possible. However, I find it a bit difficult to do so while keeping the required flexibility. Maybe someone has some good recommendations for this? The key is already restricted to TXT records, so that's good. In a nutshell, I'd like to allow only "_acme-challenge.example.com" and "_acme-challenge.*.example.com". However, the latter cannot be expressed in the current config format. I would be fine allowing "*.example.com", if I could just deny a select few names (SPF, DKIM). But AFAICT, the "deny" option only works on action, key, and address, now owner matching. Is there any other way to achieve something like this? Thanks a lot, Conrad

2 roky, 1 měsíc

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Knot DNS 3.3.9 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.9! This is a bugfix version with a few improvements. Since version 3.3.4, there has been a bug in 'keymgr pregenerate', where future timestamps of existing keys are cleared and new overlapping keys are generated instead. An upgrade is recommended if you use this function or offline KSK. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.9 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 2 měsíce

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$TTL default setting ignored for resource records without explicit TTL set

by Michael Grimm

Hi, I do have the following example zone files definitions: $ORIGIN example.tld. $INCLUDE ___TTL_SOA___ and so on My ___TTL_SOA___ looks as follows: $TTL 30m ; default expiration time of all resource records without their own TTL value ; @ IN SOA ns1.example.tld. hostmaster.example.tld. ( 2024042100 ; serial (increase after each change) 4h ; refresh (recommended >= 4h) 1h ; retry (recommended >= 1h) 14d ; expire (recommended between 7d and 14d) 600 ; negative caching (former minimum, recommended between 5m and 1d) ) Note: All of my subsequent $INCLUDDE files do *not* have TTL values set explicitly! But: I do end up in a mix of TTL values of 1800 and 3600 for my resource records. You can check that using my domain in my email address. I found the following thread about this issue at https://gitlab.nic.cz/knot/knot-dns/-/issues/751 and https://datatracker.ietf.org/doc/html/rfc2308#section-4 cited therein: "All resource records appearing after the directive, and which do not explicitly include a TTL value, have their TTL set to the TTL given in the $TTL directive." In my understanding Knot's behaviour has been set to follow this standard track. Thus, I do expect that all of my resource records should have a TTL set to my $TTL directive of 1800 seconds. I might have well overlooked something, though. Any feedback is highly appreciated, Michael

2 roky, 3 měsíce

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Knot DNS 3.3.8 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.8! This version fixes a few bugs and brings some features. I would like to ask users with hardware HSMs to send us the output of `keymgr <hsm_keystore_id> keystore-test` along with a description of the HSM. This will allow us to update https://www.knot-dns.cz/docs/latest/html/appendices.html#compatible-pkcs-11… Thank you! Note that it's no longer possible to build packages for CentOS 7 using Copr! Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.8 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 3 měsíce

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address lists

by Randy Bush

as yaml seems to vary widely, i worry that i may have over-induced knot yaml re address lists, see https://www.knot-dns.cz/docs/3.3/singlehtml/index.html#description remote: - id: foo address: 1.2.3.4 address: 2.3.4.5 address: 3.4.5.6 address: 6.7.8.9 is said to be the same as remote: - id: bar address: [1.2.3.4, 2.3.4.5, 3.4.5.6, 6.7.8.9] but is it also the same as remote: - id: feen address: [1.2.3.4, 2.3.4.5] address: [3.4.5.6, 6.7.8.9] feen does not result in a `knotc conf-check` syntax error, so i hope it is indeed equivalent. randy

2 roky, 3 měsíce

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kasp database: how to find orphaned keys?

by Michael Grimm

Hi, is there a functionality that identifies orphaned key in the kasp database and optionally deletes those? I had had a couple of orphaned pem files. I managed to identify and remove those with the help of 'keymgr' and Unix little helpers, though. Thus I am asking just out of curiosity, because I might have missed such a functionality. Thanks and regards, Michael

2 roky, 3 měsíce

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idn in axfr

by Randy Bush

knot fails to keep this zone updated. so i tested by hand ``` rip.psg.com:/home/randy# dig f.e.e.b.d.a.e.d.1.3.0.0.8.9.8.0.2.0.a.2.ip6.arpa @94.142.241.91 axfr ; <<>> DiG 9.18.24-1-Debian <<>> f.e.e.b.d.a.e.d.1.3.0.0.8.9.8.0.2.0.a.2.ip6.arpa @94.142.241.91 axfr ;; global options: +cmd ;; Warning: cannot represent 'xn--center-dla.test.globnix.net.' in the current localedig: Cannot represent 'xn--ls8h.test.globnix.net.' in the current locale nor ascii (string contains a disallowed character), use +noidnout or a different locale ``` `+noidnout` does fix it, but i am not sure i can get knot's axfr to do that the owner of the primary says Okay, this is the zone with a whole bunch of records designed to stress-test DNS implementations with things which are technically allowed in DNS at the protocol level but which apps might not handle well. Zonefile top comment: ; This is the /80 reverse DNS used for test entries which should never be ; assigned to hosts. This is </48-prefix>:DEAD:BEEF::/80 Those particular records were added on 2013-04-05 per `git blame`: 233c7992 (Phil Pennock 2013-04-05 00:08:22 +0000 64) 0.6 PTR mid\194\183dle.test.globnix.net. 233c7992 (Phil Pennock 2013-04-05 00:08:22 +0000 65) 1.6 PTR xn--center-dla.test.globnix.net. 233c7992 (Phil Pennock 2013-04-05 00:08:22 +0000 66) 2.6 PTR \240\159\146\169.test.globnix.net. 233c7992 (Phil Pennock 2013-04-05 00:08:22 +0000 67) 3.6 PTR xn--ls8h.test.globnix.net. so, `noidnout` is not in knot doc html file. clue bat, please. randy

2 roky, 3 měsíce

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Knot DNS 3.3.7 and 3.2.13 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.7 This version primarily fixes an old bug in the journal where some SOA serial values are incorrectly evaluated, which can corrupt the journal. Upgrade is recommended. Version 3.2.13 backports this and some older bug fixes. Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.3.7/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.13/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 4 měsíce

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question about unixtime

by Randy Bush

i have had a fun day chasing diags of the form ``` 2024-06-22T18:32:57.305472+00:00 ns knotd[24354]: info: [foo.com.] control, received command 'zone-reload' 2024-06-22T18:32:57.307532+00:00 ns knotd[24354]: info: [foo.com.] zone file parsed, serial 1719081134 2024-06-22T18:32:57.307669+00:00 ns knotd[24354]: warning: [foo.com.] zone file changed with decreased SOA serial 2024-06-22T18:32:57.307828+00:00 ns knotd[24354]: error: [foo.com.] zone event 'load' failed (value is out of range) ``` i have the following hypothesis: - `serial-policy: unixtime` is configured in `/etc/knot/knot.conf`. - emacs dns-mode sets the SOA serial to the current unixtime when one saves the zone file - a few seconds later, i do `knotc zone sign` and `knotc zone-reload` - knot then says "you have manually specified a new serial, but it is less than the current unixtime; i.e. you are trying to go backward. bad geek!" - i.e. knot did not like me mucking with the SOA serial in the zone file when `serial-policy: unixtime` was configured. i tested this hypothesis by putting the serial from the server's current SOA in the zone file and doing sign & reload. it succeeded, and the new zone in all servers is the unixtime of the signing, not of the zone file. my current conclusion is: do not have both emacs dns-mode with `serial-policy: unixtime`; use only one or t'other. especially if doing RFC 1982 serial stepping, remember to first turn off `serial-policy: unixtime` and `knotc reload`. does this make sense? randy

2 roky, 4 měsíce

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tcp ddos

by Randy Bush

so, school is out and the children are on the loose 2024-06-10T21:27:24.199750+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 2620:171:c2::49@33322 2024-06-10T21:27:24.200561+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 167.99.160.10@14871 2024-06-10T21:27:24.200642+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 34.223.46.240@53392 2024-06-10T21:27:24.201218+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 167.99.160.10@2011 2024-06-10T21:27:24.201422+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 81.106.125.151@54192 2024-06-10T21:27:24.203263+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 34.223.46.240@53398 2024-06-10T21:27:24.203643+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 139.99.166.37@42942 2024-06-10T21:27:25.199585+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 3.228.173.229@34084 2024-06-10T21:27:25.199678+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 76.93.200.106@10371 2024-06-10T21:27:25.200951+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 2a02:6b8:c04:262:0:433f:1:3@33586 2024-06-10T21:27:25.201029+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 2600:3c09::f03c:93ff:fea9:4de0@54166 2024-06-10T21:27:25.201207+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 118.99.2.29@33170 2024-06-10T21:27:25.201385+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 213.187.92.252@40559 2024-06-10T21:27:26.200340+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 2a02:6b8:c04:262:0:433f:1:3@33594 2024-06-10T21:27:26.200529+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 40.79.144.82@59683 2024-06-10T21:27:26.203837+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 103.85.93.93@60578 2024-06-10T21:27:26.205102+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 13.244.33.51@33812 2024-06-10T21:27:27.208589+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 18.139.204.179@46824 2024-06-10T21:27:27.210062+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 20.125.201.35@63627 2024-06-10T21:27:27.331742+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 172.217.37.144@64719 2024-06-10T21:27:27.332050+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 191.233.201.73@61718 2024-06-10T21:27:27.391797+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 81.106.125.151@50624 like tens of thousands. some children are like that. so, we take this as an opportunity to learn a bit more about knot tuning we shortened `tcp-idle-timeout: 2` we set `tcp-max-clients: 20` rate limiting seems unlikely to improve things as it is many sources, a DDos what else are we missing? btw, it also whacked knot enough that it failed a resign cycle and we had to add `unsafe-operation: no-check-keyset` to get back to signing. clues appreciated. this can't be the only neighborhood with children. randy

2 roky, 4 měsíce

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DNSSEC debugging help wanted

by Korry Luke

Hi folks, Forwarding on behalf of Randy Bush since his mail server/DNS are being DDoSed right now. Trying to troubleshoot, but any knot DNS expertise would be greatly appreciated. Regards > debian 12 > knotc (Knot DNS), version 3.2.6 > (aside: the server is under serious TCP and UDP DDoS) > > all looks reasonable > > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] control, received command 'zone-sign' > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, dropping previous signatures, re-signing zone > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 53567, algorithm RSASHA256, KSK, public, active > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 25843, algorithm RSASHA256 > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 59161, algorithm RSASHA256 > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 5489, algorithm RSASHA256, KSK, public, active+ > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 22090, algorithm RSASHA256, public > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, signing started > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, successfully signed > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, next signing at 2024-06-25T02:36:17+0000 > > # keymgr psg.com list > 649b0d43d1493dd4ad30f8043ca4561c33c38b5a 53567 KSK RSASHA256/2048 publish=1078099200 active=1078099200 > 173597db4b4f2f072b568cb637710e891ac52246 25843 ZSK RSASHA256/2048 publish=1709251200 active=1709251200 retire=1717977600 remove=1717977600 > 3194d896f2a64f10b103991e5018b72cd3f1cd28 59161 ZSK RSASHA256/2048 publish=1709251200 active=1709251200 retire=1717977600 remove=1717977600 > 7b1bf414b34f605c68f9ddb7b52c32c6b53da8d3 5489 KSK RSASHA256/2048 publish=1718161132 > 902b8e02a5e75754bd69791735e76cb11c3e37af 22090 ZSK RSASHA256/2048 publish=1718161132 > > > but no rrsig > > # dig @localhost +vc +dnssec +norec -t dnskey psg.com > > ; <<>> DiG 9.18.24-1-Debian <<>> @localhost +vc +dnssec +norec -t dnskey psg.com > ; (2 servers found) > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42269 > ;; flags: qr aa; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1 > > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags: do; udp: 1232 > ; COOKIE: 7f45da4f7305fdd5010000006669234c9ce14bdf78917f58 (good) > ;; QUESTION SECTION: > ;psg.com. IN DNSKEY > > ;; ANSWER SECTION: > psg.com. 86400 IN DNSKEY 256 3 8 AwEAAZfG8Y++ZmGXwa1sgmHpruUSPljDwMR2pY5bUjjOaJNyUBeLlEAP Fyya3MNAKryW26yTxFmwYmyt0UtXyc4L7Ib5/J/Ew+putYpjRfslwPlS 5TWblvnbiqGcY/ZMuGrtLeZkvK/o39vXM+Hy5y3xbG4Qu4ySiuW03xMM pN50cr8+VcM2RDQn6/W6kESdiY8WaXyD1DT9eIgIyi5zTaOfhSB7u/g7 H+7LltCAiCZIcIF08CGbS1VEh0YUyw3Th1I6jiQmYeGG6OSGaci5SkjV fGTDpHrJOjFlCnUVfg+cYc1YPEojbmo90qO/nG+VB5I+qDYtkU1IR8EB +qXNi7ZbBt8= > psg.com. 86400 IN DNSKEY 257 3 8 AwEAAaCgMhvfatdo1jeqr0AsHJY+QB/QVv2O+9W62Sfj+xKCbV5nGgvu XqPq2A8tXKT1lG1YF0pe3/ABH2iYNZs7v/a6QAb1wEAYasNz6ZlvRca2 bDs6KXz/n2B/Oeb2JoWBJ6OqdNtzkDl6CYEOkQoDWRnbR9jlyINOQ0mN xfTu2wbXMngSIz78yTadpieyuG/B/TsLQ1SlTUSf436G5NMdxzQ8r7j4 5nW7mEORzvvk5Z1mGtfX8v8taw4qFfoIlaf226N06lZ90jpnEHTOGSTA T/ii5WVqjBZGFWFYWrNcHR51zHm4QAGKlZ5hzr6lrGZaXqgY7jE3GaOc 86mZhSlyYIs= > psg.com. 86400 IN DNSKEY 257 3 8 AwEAAcXR1VhQRarToAaewor9xoQhrXbmUd9Ob0ruqOpDs5TO/jZLTOFE W/g4V1yllr9t7tyLVJWA5jdZyJZO3otyu6S+OKvSLD8er3alStkgqI2Q bLF3gUjtGxmcd/yIci4srWj401tv/6uWigN50+9Df0ClgUpmdjQ/ePq8 51DKtK51qGgc4vHwSYoWKQaGTofELiMDDXpzZSkQqAUveZYRzVTScUCQ woVjQANSmio/u6JZtkwRnnUF9bChN51ydUY+uVH9NuoY6jEKJ27ZlIAP 4UgQ0h9epWy5JYV9bNQlhV+qpW1G3Zg/l58Yz5mWwh107HQIUefCgVP+ TTIusTwWH0E= > > ;; Query time: 0 msec > ;; SERVER: ::1#53(localhost) (TCP) > ;; WHEN: Wed Jun 12 04:25:48 UTC 2024 > ;; MSG SIZE rcvd: 892 > > maybe 35 zones with same policy and tenplate. one has RRSIGs no others > do. > > mod-rrl: > - id: default > rate-limit: 12 # Allow 200 resp/s for each flow > slip: 2 # Approximately every other response slips > table-size: 900241 > > mod-cookies: > - id: default > secret-lifetime: 30h > badcookie-slip: 6 > Wrong Cookie > > Policy: > - Id: Pol-256-256 > Algorithm: Rsasha256 # Was Ecdsap256sha256 Sra Uses Ecdsap384sha384 > Manual: On > Delete-Delay: 30d > Unsafe-Operation: No-Check-Keyset > ... > template: > - id: default > storage: /var/lib/knot/primary > semantic-checks: on > file: %s > global-module: mod-rrl/default > global-module: mod-cookies/default > - id: signed > storage: /var/lib/knot/signed > dnssec-signing: on > dnssec-policy: pol-256-256 > semantic-checks: on > zonefile-sync: -1 > zonefile-load: difference > journal-content: all > serial-policy: unixtime > > sra and i have been beating our heads on this for two days. and there > are significant zones breaking > > randy -- Korry Luke ルーク,　コリー koluke(a)wide.ad.jp Graduate School of Media and Governance Keio University Shonan Fujisawa Campus 慶應義塾大学湘南藤沢キャンパス政策・メディア研究科

2 roky, 4 měsíce

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Knot DNS 3.3.6 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.6! This is mostly a maintenance version with some improvements. Please note that Knot DNS 3.3 is the last major version officially supported on CentOS 7 (and similar), Debian 10, and Ubuntu 18.04. Version 3.4.0, which will be released in August, will not support them. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.6 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 4 měsíce

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Knot DNS serverupgrade tool (2.2.x->3.3.x)

by Josef Karliak

Good morning, is there some tool to migrate configuration from Knot 2.2 to actual 3.3.x ? There are some configuration changes, they're so far so good, but I'm stuck on migrating DNSSEC keys now. Thanks and best regards. J.Karliak

2 roky, 4 měsíce

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install package to freebsd

by André Cruz

Hi, When i try to install knot via ports as your documentation sayshttps://www.knot-dns.cz/docs/2.4/html/installation.html [cid:f31a0a83-7640-46e7-8586-d353f8c3d8f0] it points me to a verison of 2015 https://www.freshports.org/dns/knot Can you guys change the line to # cd /usr/ports/dns/knot3 just to be more clear for a new user of freebsd https://www.freshports.org/dns/knot3 Com os meus melhores cumprimentos, André Cruz

2 roky, 5 měsíců

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module 'mod-onlinesign/authsignal', incompatible with automatic signing

by Erwin Lansing

Howdy, I’m trying to get Knot 3.3.5 to use authenticated DNSSEC bootstrapping following the blog article and docs. However, I’m getting an error for the signalling zones, but I fail to figure out what I may have overlooked. error: [_signal.ns2.droso.dk <http://signal.ns2.droso.dk/>.] module 'mod-onlinesign/authsignal', incompatible with automatic signing Relevant knot.conf snippets (in order): policy: - id: ecc algorithm: ecdsap256sha256 nsec3: on rrsig-refresh: 7d mod-onlinesign: - id: authsignal nsec-bitmap: [CDS, CDNSKEY] policy: ecc template: - id: default … dnssec-signing: on dnssec-policy: ecc … zone: - domain: _signal.ns2.droso.dk <http://signal.ns2.droso.dk/> module: [mod-authsignal, mod-onlinesign/authsignal] Any hint appreciated Best Erwin

2 roky, 5 měsíců

3
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KNOT resolver and NS serverers with CNAME

by Josef Karliak

Good morning, ISC bind is strict about CNAME of NS server: skipping nameserver 'aa.bb.cz' because it is a CNAME, while resolving '9.4/4.3.2.1.in-addr.arpa/PTR'. How about Knot resolver ? Thanks and best regards J.Karliak

2 roky, 5 měsíců

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Remotely adding zones

by Einar Bjarni Halldórsson

Hi, I have a use case, where today we’re running BIND and a daemon uses rndc to create/remove/update zones on secondary servers. According to `man knotc` knotc only supports UNIX sockets (old ubuntu man page showed ‘-p’ parameter to specify port). I know I could use a catalog zone, but that would be a bigger change than I prefer right now. The primary server is running BIND+DLZ with a PostgreSQL backend. Replacing the primary is on the roadmap, but for now, I just want to replace the secondaries. Is there a good way to remotely add zones to a knot secondary? .einar

2 roky, 6 měsíců

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knotc reload after updates to knot.conf

by Angus Clarke

Hello, When doing something quite dramatic in knot.conf like adding and/or removing a zone, is "knotc reload" a suitable approach to honour those changes or would you recommend restarting the whole process? "knotc reload" seems to work just fine in test, I'm just looking for some further confidence I suppose. Thanks Angus

2 roky, 6 měsíců

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kzonecheck for bookworm

by Randy Bush

a bit confused here. knot package for bookworm does not seem to include kzonecheck. nor does knot-dnsutils. where/how to get? thanks randy

2 roky, 6 měsíců

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AXFR sender FINs 10% of the way through transfer

by Randy Bush

debian 12 # uname -a Linux rip.psg.com 6.1.0-18-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.76-1 (2024-02-01) x86_64 GNU/Linux # knotc --version knotc (Knot DNS), version 3.2.6 AXFR of a 750k zone from seattle to, lebanon, europe, iceland, southern africa, ...) fails over v5 and v6, i.e. somewhat larger rtt same AXFR seattle seattle or seattle to ashburn works v4 and v6. seattle to dallas v4 good, v6 fails, but it smells of an HE.net hop. when it fails, it is always within a hundred or so mytes of the same place, approximately 10% through the file. pcap of seattle->beirut at https://archive.psg.com/240323.beirut.pcap the last payload is in frame 217. at 219, seattle (b) sends a FIN/PSH/ACK. then at 251, after acking everything, beirut (nabil) FIN/ACKs seattle's FIN and we're dead. i am not positive this is the key question as my tcp fu is a bit rusty. but why did seattle send the FIN at 219, 10% through the file? randy

2 roky, 7 měsíců

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silly nit

by Randy Bush

in address: [185.91.97.18, 2a05:e380:2:4::2] # nabil.beirutix.net if this is a tab character ^ # knotc conf-check error: config, file '/etc/knot/knot.conf', line 324, item 'address', value '2a05:e380:2:4::2' (tabulator character is not allowed) blanks are ok # knotc --version knotc (Knot DNS), version 3.2.6 yes, that is the latest on debian 12 randy

2 roky, 7 měsíců

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bitw signing as secondary

by Randy Bush

server runs a tld as primary, but slds are hidden primaries which the server pulls as a secondary, wants to sign bump-in-the-wire, and then make available to public secondaries. i think that the doc says this is doable, but instructions are insufficiently explicit for this idjit. i am fetching the slds into policy: - id: pol-256-256 algorithm: rsasha256 # was ecdsap256sha256 sra uses ecdsap384sha384 manual: on ... template: - id: signed storage: /var/lib/knot/sec-sign dnssec-signing: on dnssec-policy: pol-256-256 zonefile-sync: -1 zonefile-load: difference journal-content: all serial-policy: unixtime ... zone: - domain: sld.tld file: tld.sld # sorry, i like alpha sort in `ls` :) master: hidden-fetch template: signed acl: [allow-local, secondaries-push] the policy and template are those from signing primary zone; which i suspect is ill advised. i did generate keying as i would when signing a primary zone # keymgr sld.tld generate algorithm=rsasha256 ksk=yes zsk=yes 7a618eaf94ea1d903233cb547faa24bae8cb49a5 # knotc zone-reload sld.tld OK # keymgr sld.tld ds sld.tld. DS 63562 8 2 2d25e465f131900413d7e8a90ad1b96c75ba835de63dfee08610b113a779d41f sld.tld. DS 63562 8 4 ed9c31c495703ec354f1a1835c9878339224cc06ac3001151c2ebb89524b25190efa424348c999b0c4df940edffa8409 any kind soul(s) care to whack me with a clue bat? randy

2 roky, 7 měsíců

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Possible signing bug? Missing wildcard NSEC for RCODE 3 subdomains

by Matthew Pounsett

I got a report of an NSEC error from someone who tried to connect to a mistyped hostname. I've done a bit of poking, and it looks like we're seeing a missing wildcard NSEC for domain names that are two subdomains down from the apex, but not for subdomains of the apex. Though, I admit I can't see the problem myself. Querying by hand I see what looks like an identical response, but resolvers and DNSViz report problems with the deeper name. For example, nonexistent.dns-oarc.net and nonexistent.sjc.dns-oarc.net ( sjc.dns-oarc.net is a real subdomain with hosts in it, not an ENT)... kdig output and DNSViz results below. We're running knot/unknown,now 3.3.5-cznic.1~bullseye from deb.knot-dns.cz, and this is the relevant policy statement for the zone: policy: - id: ecdsa algorithm: ecdsap256sha256 ksk-lifetime: 365d ksk-submission: parent_zone_sbm zsk-lifetime: 30d rrsig-lifetime: 14d rrsig-refresh: 7d We are mid-KSK-roll, waiting on the DS submission check. Have I misconfigured something here, or is there a signing bug, or is this something else? Thanks! Matt --- nonexistent.sjc.dns-oarc.net: DNSviz reports this is fine. <https://dnsviz.net/d/nonexistent.dns-oarc.net/ZfNH1w/dnssec/> ;; ->>HEADER<<- opcode: QUERY; status: NXDOMAIN; id: 9380 ;; Flags: qr aa; QUERY: 1; ANSWER: 0; AUTHORITY: 6; ADDITIONAL: 1 ;; EDNS PSEUDOSECTION: ;; Version: 0; flags: do; UDP size: 1232 B; ext-rcode: NOERROR ;; QUESTION SECTION: ;; nonexistent.dns-oarc.net. IN A ;; AUTHORITY SECTION: dns-oarc.net. 3600 IN SOA ns1.dns-oarc.net. hostmaster.dns-oarc.net. 2024031400 300 60 604800 3600 nfsen.dns-oarc.net. 3600 IN NSEC ns.dns-oarc.net. A AAAA RRSIG NSEC dns-oarc.net. 3600 IN NSEC fs1.10g.dns-oarc.net. A NS SOA MX TXT AAAA RRSIG NSEC DNSKEY CDS CDNSKEY CAA dns-oarc.net. 3600 IN RRSIG SOA 13 2 14400 20240328021935 20240314004935 6048 dns-oarc.net. [omitted] nfsen.dns-oarc.net. 3600 IN RRSIG NSEC 13 3 3600 20240326215132 20240312202132 6048 dns-oarc.net. [omitted] dns-oarc.net. 3600 IN RRSIG NSEC 13 2 3600 20240322045130 20240308032130 6048 dns-oarc.net. [omitted] ;; Received 518 B ;; Time 2024-03-14 18:57:33 UTC ;; From 64.191.0.128@53(UDP) in 0.3 ms nonexistent.sjc.dns-oarc.net: resolvers and DNSViz report a missing wildcard NSEC <https://dnsviz.net/d/nonexistent.sjc.dns-oarc.net/ZfNH6w/dnssec/> ;; ->>HEADER<<- opcode: QUERY; status: NXDOMAIN; id: 660 ;; Flags: qr aa; QUERY: 1; ANSWER: 0; AUTHORITY: 6; ADDITIONAL: 1 ;; EDNS PSEUDOSECTION: ;; Version: 0; flags: do; UDP size: 1232 B; ext-rcode: NOERROR ;; QUESTION SECTION: ;; nonexistent.sjc.dns-oarc.net. IN A ;; AUTHORITY SECTION: dns-oarc.net. 3600 IN SOA ns1.dns-oarc.net. hostmaster.dns-oarc.net. 2024031400 300 60 604800 3600 newmail.sjc.dns-oarc.net. 3600 IN NSEC pdu-7301.sjc.dns-oarc.net. A AAAA RRSIG NSEC shin-cubes.dns-oarc.net. 3600 IN NSEC an1.10g.sjc.dns-oarc.net. A AAAA RRSIG NSEC dns-oarc.net. 3600 IN RRSIG SOA 13 2 14400 20240328021935 20240314004935 6048 dns-oarc.net. [omitted] newmail.sjc.dns-oarc.net. 3600 IN RRSIG NSEC 13 4 3600 20240326215132 20240312202132 6048 dns-oarc.net. [omitted] shin-cubes.dns-oarc.net. 3600 IN RRSIG NSEC 13 3 3600 20240326215132 20240312202132 6048 dns-oarc.net. [omitted] ;; Received 544 B ;; Time 2024-03-14 18:57:33 UTC ;; From 64.191.0.128@53(UDP) in 0.3 ms

2 roky, 7 měsíců

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Chained catalog zones

by Martin Huněk

Hi folks, Is it possible to chain multiple upstream catalog zones into one downstream one? I do have the following topology: Multiple DNS hidden masters <-> DNS signer / DNS master for public facing slaves <-> public facing slaves Can I define catalog zones on hidden masters and use them on public-facing signer/master to compose a catalog zone for the slaves? Best Regards, Martin Hunek Freenet Liberec, z.s.

2 roky, 7 měsíců

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Knot DNS 3.3.5 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.5! This is a bugfix version with a few new features and enhancements. For those who use dnssec-validation, upgrade is recommended. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.5 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 7 měsíců

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zone lost its KSK

by Bastien Durel

Hello, today I had a long power outage that stopped my primary server for a dozen hours When I re-started the server, some zones refused to start : Feb 12 21:55:17 arrakeen knotd[20728]: info: [geekwu.org.] DNSSEC, signing zone Feb 12 21:55:17 arrakeen knotd[20728]: error: [geekwu.org.] zone event 're-sign' failed (invalid parameter) the invalid parameter was there was no active KSK for these zones, as a keymgr list show b37b6c2[...] 39945 KSK ECDSAP384SHA384 publish=1636966605 active=1637053005 7cc8622[...] 20799 ZSK ECDSAP384SHA384 created=1706695010 After manually setting published & active status in keygmr, reloading these zones succeeded, and knot restarted to serve them. Do you know how these zone could has failed as this ? They run fine on auto-sign for years now. should I monitor closely the ones that need a re-sign tomorrow ? Regards, -- Bastien

2 roky, 8 měsíců

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error: [ellael.org.] zone event 'refresh' failed (operation not supported)

by Michael Grimm

Hi, after successful migration of my hidden primary NSD and OpenDNSSEC signer to Knot DNS, I started to migrate my secondary NSDs to Knot DNS as well. Thanks to excellent documentation this migration went more or less flawless as well. BUT: I am somehow irritated about the following error messages at my hidden primary like: 2024-02-16T10:54:08+0100 debug: [ellael.org.] ACL, allowed, action transfer, remote 10.1.1.201@27919, key primary-secondary. 2024-02-16T10:54:08+0100 info: [ellael.org.] AXFR, outgoing, remote 10.1.1.201@27919 TCP, started, serial 2024021331 2024-02-16T10:54:08+0100 info: [ellael.org.] AXFR, outgoing, remote 10.1.1.201@27919 TCP, finished, 0.00 seconds, 1 messages, 7774 bytes 2024-02-16T10:54:09+0100 debug: [ellael.org.] ACL, allowed, action notify, remote 10.1.1.201@40884, key primary-secondary. 2024-02-16T10:54:09+0100 info: [ellael.org.] notify, incoming, remote 10.1.1.201@40884 TCP, serial 2024021331 >>>! 2024-02-16T10:54:09+0100 error: [ellael.org.] zone event 'refresh' failed (operation not supported) The log files at both secondary are identical, here one example: 2024-02-16T10:54:08+0100 info: [ellael.org.] AXFR, incoming, remote 10.2.2.203@5333 TCP, finished, 0.00 seconds, 1 messages, 7774 bytes 2024-02-16T10:54:08+0100 info: [ellael.org.] refresh, remote 10.2.2.203@5333, zone updated, 0.03 seconds, serial none -> 2024021331,\ expires in 1209600 seconds 2024-02-16T10:54:08+0100 info: [ellael.org.] zone file updated, serial 2024021331 >>>! 2024-02-16T10:54:09+0100 info: [ellael.org.] notify, outgoing, remote 10.2.2.203@5333 TCP, serial 2024021331 FYI: Those errors are only logged when a zone gets updated or using "knotc zone-notify" at the secondary site. Here are my essential config excerpts: Primary: acl: - id: aclTRANSACTIONS key: primary-secondary action: [notify, transfer] remote: - id: secondaryKBN key: primary-secondary address: 10.1.1.201 # KBN secondary via: 10.2.2.203 # outgoing interface Secondary: acl: - id: aclTRANSACTIONS key: primary-secondary action: [notify, transfer] remote: - id: primaryMWN key: primary-secondary address: 10.2.2.203@5333 # MWN hidden primary via: 10.2.2.201 # outgoing interface block-notify-after-transfer: on FYI: Only adding "block-notify-after-transfer: on" at secondary sites stopped those error messages. I found https://www.mail-archive.com/knot-dns-users@lists.nic.cz/msg01812.html : "I recommend not using this option unless you really know what you're doing and why this option is essential for you." Questions: #) I do have to admit, I don't understand what is going on without "block-notify-after-transfer: on"? #) Am I save in using "block-notify-after-transfer: on"? #) Or is the another config option? Thanks in advance and regards, Michael

2 roky, 8 měsíců

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Secondary zones with some primary servers unreachable log interesting errors

by Juha Suhonen

Hello fellow Knot users, We're using Knot on some of our public authoritative servers. We operate a hidden primary configuration where there are two internal primary servers sending notifies to publicly accessible servers whenever zones change (ofc internal servers allow zone transfers & queries from the knot servers). By design, our hidden internal primary servers operate in a hot/cold setup - one of them is answering to zone transfers / sending out notifies and the other one is not (dns server software is not running on the cold server). This configuration causes knot to log alarming errors: Feb 1 17:28:45 ns2 knotd[624]: info: [zone.fi.] refresh, remote 10.54.54.1@8054, remote serial 2021083015, zone is up-to-date, expires in 864000 seconds Feb 1 17:28:45 ns2 knotd[624]: info: [zone.fi.] refresh, remote hidden-ns-2.internal, address 10.54.54.2@8054, failed (connection reset) Feb 1 17:28:45 ns2 knotd[624]: info: [zone.fi.] refresh, remote hidden-ns-2.internal, address [ipv6_address]@8054, failed (connection reset) Feb 1 17:28:45 ns2 knotd[624]: warning: [zone.fi.] refresh, remote hidden-ns-2.internal not usable Feb 1 17:28:45 ns2 knotd[624]: error: [zone.fi.] refresh, failed (no usable master), next retry at 2024-02-01T17:58:45+0200 Feb 1 17:28:45 ns2 knotd[624]: error: [zone.fi.] zone event 'refresh' failed (no usable master) Specifically, error "(no usable master)" is worrying - knot is able to reach hidden-ns-1.internal and verify that the zone it has is up-to-date. Also zone updates work normally and the zones don't seem to expire away (as zones should do if no master is reachable for an extended period of time). Looks like this error appeared in version 3.3.0. 3.2.9 did not log similar errors (except in cases where all primaries really were unreachable). Has there been some design change in 3.3.0 (ie is this intentional) or could this be a bug? Or could it be related to our configuration? Our configuration relies heavily on templates. These should be the important bits from knot's config, with ipv6 addresses hidden: acl: - id: "hidden-ns-1.internal" address: [ 10.54.54.1, ipv6_address ] action: notify - id: "hidden-ns-2.internal" address: [ 10.54.54.2, ipv6_address ] action: notify remote: - id: "hidden-ns-1.internal" address: [ 10.54.54.1@8054, ipv6_address@8054 ] via: [ x.x.x.x, ipv6_address ] - id: "hidden-ns-2.internal" address: [ 10.54.54.2@8054, ipv6_address@8054 ] via: [ x.x.x.x, ipv6_address ] template: - id: default storage: /var/lib/knot/zones master: hidden-ns-1.internal master: hidden-ns-2.internal acl: hidden-ns-1.internal acl: hidden-ns-2.internal semantic-checks: false global-module: mod-rrl/default zone: - domain: zone.fi -- Juha Suhonen Senior Systems Specialist CSC - Tieteen tietotekniikan keskus Oy juha.suhonen(a)csc.fi

2 roky, 8 měsíců

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Set propagation-delay based on multiples of SOA TTL, doable?

by Michael Grimm

Hi, I wonder if it would be possible that one may use arithmetics in knot.conf such as: propagation-delay: 5 * dnskey-ttl I'd like to set a propagation-delay safety net during ZSK rotations depending on SOA TTL set for any given zone. As dnskey-ttl defaults to zone SOA TTL that would allow for propagation-delay definitions as multiples of SOA TTLs. As I couldn't find that in the documentation, I do assume that this cannot be done, right? Are there alternatives at hand I overlooked? Regards, Michael

2 roky, 8 měsíců

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keymgr segmentation fault

by Erik P. Ostlyngen

Hi, I'm evaluating the Knot DNS server as a DNSSEC signer engine. I'm currently running version 3.2.6 together with SoftHSM version 2.6.1 on an Ubuntu 20.04 linux server. Now I have a problem with keymgr crashing with a segmentation fault and dumping core. This happens with some of the commands of keymgr, but not all (the command keymgr -l runs fine). The commands 'keymgr trondheim.no list' produces the correct output, but then crashes. /var/log/apport.log indicates that a dbus session is missing in the environment: ERROR: apport (pid 811054) Tue Jun 13 07:56:00 2023: called for pid 811052, signal 11, core limit 0, dump mode 2 ERROR: apport (pid 811054) Tue Jun 13 07:56:00 2023: not creating core for pid with dump mode of 2 ERROR: apport (pid 811054) Tue Jun 13 07:56:00 2023: executable: /usr/sbin/keymgr (command line "keymgr trondheim.no list") ERROR: apport (pid 811054) Tue Jun 13 07:56:00 2023: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment ERROR: apport (pid 811054) Tue Jun 13 07:56:00 2023: apport: report /var/crash/_usr_sbin_keymgr.0.crash already exists and unseen, skipping to avoid disk usage DoS Running the command as 'dbus-run-session keymgr trondheim.no list' gives: ERROR: apport (pid 811174) Tue Jun 13 08:01:04 2023: called for pid 811173, signal 11, core limit 0, dump mode 2 ERROR: apport (pid 811174) Tue Jun 13 08:01:04 2023: not creating core for pid with dump mode of 2 ERROR: apport (pid 811174) Tue Jun 13 08:01:04 2023: executable: /usr/sbin/keymgr (command line "keymgr trondheim.no list") ERROR: apport (pid 811174) Tue Jun 13 08:01:04 2023: is_closing_session(): Could not determine DBUS socket. ERROR: apport (pid 811174) Tue Jun 13 08:01:04 2023: apport: report /var/crash/_usr_sbin_keymgr.0.crash already exists and unseen, skipping to avoid disk usage DoS I've tried to run the command as root and as the knot user, and I have to admit that I'm not very familiar with how to manage dbus sessions. I want to run the keymgr command from cron or from some other system shell, for periodically monitoring the keys. However, I'm unsure why keymgr wants to communicate on the dbus. Is it possible to disable this? Regards, Erik Østlyngen

2 roky, 8 měsíců

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DDNS not working as expected

by JeeF Software spol. s r.o.

Hi Knot-DNS Support, I'm trying simple DDNS scenario (no keys, no DNSSEC) with failing result. Knot-DNS is installed from docker image. Could you let me know what is the issue (NOAUTH) and how can I solve it or if this scenario is not supported what exactly is required by DDNS? ------------------------------------------- knot.conf: server: rundir: "/rundir" user: knot:knot automatic-acl: on listen: 0.0.0.0@53 log: - target: stdout server: debug zone: debug any: debug database: storage: "/storage" acl: - id: acl_update action: update - id: acl_transfer action: transfer template: - id: default storage: "/storage" file: "%s.zone" zone: # Primary zone - domain: example.com acl: [acl_update, acl_transfer] ---------------------------------------------- update: server 10.2.0.88 zone exmaple.com update add _acme-challenge.example.com. 300 TXT "aaaaa" send -------------------------------------------- knsupdate -d < update ;; DEBUG: cmd_server: lp='10.2.0.88' ;; DEBUG: parse_host: parsed addr: 10.2.0.88 ;; DEBUG: cmd_zone: lp='exmaple.com' ;; DEBUG: cmd_update: lp='add _acme-challenge.example.com. 300 TXT "aaaaa"' ;; DEBUG: cmd_add: lp='_acme-challenge.example.com. 300 TXT "aaaaa"' ;; DEBUG: cmd_send: lp='' ;; DEBUG: sending packet ;; DEBUG: pkt_sendrecv: send_msg = 3 ;; DEBUG: pkt_sendrecv: receive_msg = 29 ;; ->>HEADER<<- opcode: UPDATE; status: NOTAUTH; id: 27029 ;; Flags: qr; ZONE: 1; PREREQ: 0; UPDATE: 0; ADDITIONAL: 0 ;; ZONE SECTION: ;; exmaple.com. IN SOA ;; ERROR: update failed with error 'NOTAUTH' ;; DEBUG: operation 'send' failed (failed) on line 'send' ;; DEBUG: srv_info_free: null parameter ----------------------------------------- knotd log 2023-09-05T17:16:35+0000 info: Knot DNS 3.3.0 starting 2023-09-05T17:16:35+0000 info: loaded configuration file '/config/knot.conf', mapsize 500 MiB 2023-09-05T17:16:35+0000 info: using UDP reuseport, incoming TCP Fast Open 2023-09-05T17:16:35+0000 info: binding to interface 0.0.0.0@53 2023-09-05T17:16:35+0000 info: changing GID to 8521 2023-09-05T17:16:35+0000 info: changing UID to 9396 2023-09-05T17:16:35+0000 info: loading 1 zones 2023-09-05T17:16:35+0000 info: [example.com.] zone will be loaded 2023-09-05T17:16:35+0000 info: starting server 2023-09-05T17:16:35+0000 info: [example.com.] zone file parsed, serial 2010111213 2023-09-05T17:16:35+0000 info: [example.com.] loaded, serial none -> 2010111213, 465 bytes 2023-09-05T17:16:35+0000 info: control, binding to '/rundir/knot.sock' 2023-09-05T17:16:35+0000 info: server started in the foreground, PID 8 2023-09-05T17:18:03+0000 info: [example.com.] control, received command 'zone-status' 2023-09-05T17:18:40+0000 info: [example.com.] control, received command 'zone-sign' 2023-09-05T17:18:40+0000 error: [example.com.] control, error (operation not supported) 2023-09-05T17:18:52+0000 info: [example.com.] control, received command 'zone-read' 2023-09-05T17:18:56+0000 info: [example.com.] control, received command 'zone-read' 2023-09-05T17:18:56+0000 error: [example.com.] control, error (no such node in zone found) 2023-09-05T17:19:00+0000 info: [example.com.] control, received command 'zone-read' 2023-09-05T17:19:45+0000 info: [example.com.] control, received command 'zone-set' 2023-09-05T17:19:45+0000 error: [example.com.] control, error (no active transaction) 2023-09-05T17:22:57+0000 info: [example.com.] control, received command 'zone-set' 2023-09-05T17:22:57+0000 error: [example.com.] control, error (no active transaction) 2023-09-05T17:23:49+0000 info: [example.com.] control, received command 'zone-begin' 2023-09-05T17:23:54+0000 info: [example.com.] control, received command 'zone-set' 2023-09-05T17:24:02+0000 info: [example.com.] control, received command 'zone-commit' 2023-09-05T17:24:02+0000 info: [example.com.] zone file updated, serial 2010111213 -> 2010111214 btw. no info positive/negative regarding the DDNS -------------------------------------- example.com.zone example.com. 3600 SOA dns1.example.com. hostmaster.example.com. 2010111214 21600 3600 604800 86400 example.com. 3600 A 1.2.3.4 example.com. 3600 NS dns1.example.com. example.com. 3600 NS dns2.example.com. example.com. 3600 MX 10 mail.example.com. dns1.example.com. 3600 A 192.0.2.1 dns1.example.com. 3600 AAAA 2001:db8::1 dns2.example.com. 3600 A 192.0.2.2 dns2.example.com. 3600 AAAA 2001:db8::2 mail.example.com. 3600 A 192.0.2.3 mail.example.com. 3600 AAAA 2001:db8::3 Thanks. Best Regards, JohnF

2 roky, 8 měsíců

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NSEC3 RR not generated, dunno why.

by Michael Grimm

Hi, I am still very new to knot ;-) FYI: This is Knot DNS 3.3.3 because 3.3.4 hasn't been shown up in FreeBSD's ports collectioon, yet. Here are my settings regarding dnssec policy: policy: - id: ecdsa algorithm: ecdsap256sha256 ksk-lifetime: 3650d zsk-lifetime: 330d propagation-delay: 1d nsec3: on cds-cdnskey-publish: rollover Whatever I tell nsec3, either "on" or "true", only NSEC RR are generated, no NSEC3. dns> grep -i nsec3 zones/ellael.org dns> dns> grep -i nsec zones/ellael.org 3600 IN RRSIG NSEC 13 2 3600 20240226084528 20240212071528 9562 ellael.org. fkpFcgkVq8ZRZT0GX5kVcfPZBB5S/2Gvh4XqrkrywbZXFKiCttYqCX7rBdJSbyem5G8Bxg1LKaxu7LrIoxtyVA== 3600 IN NSEC _dmarc.ellael.org. A NS SOA MX TXT AAAA RRSIG NSEC DNSKEY CAA 3600 IN RRSIG NSEC 13 3 3600 20240226084528 20240212071528 9562 ellael.org. R7Pz2JuKi7vQDe0KMt29NHGtKvuEnH2LPKcxTWLP9HyfuMxJx4BEyPE6i+JAw8RxfSIqWAcV/KMyCHaLgFtXXw== 3600 IN NSEC _token._dnswl.ellael.org. TXT RRSIG NSEC 3600 IN RRSIG NSEC 13 4 3600 20240226084528 20240212071528 9562 ellael.org. 3oUCWWTH2s9oH/Ea0b+MDrrQcOEuTbwx1iEuXaLq7wFribrnIGY8JeeiE3TO59n1lckKm4hia+2ox324xoxCzA== [snip] What am I doing wrong? Thanks in advance and kind regards, Michael

2 roky, 8 měsíců

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How to check for next KSK or ZSK rollover dates?

by Michael Grimm

Hi, I am very new to Knot [1]. Excerpts from my knot.conf: policy: ... ksk-lifetime: 3650d zsk-lifetime: 330d propagation-delay: 1d ... dns> knotc zone-status ellael.org [ellael.org.] role: master | serial: 2024021201 | re-sign: +12D8h42m21s I am a bit puzzled by that "re-sign: +12D8h42m21s". Does that mean "time until newly issued signatures" and becomes triggered by default "rrsig-lifetime: 14d" value? If so, I am very much relieved, if not, what is going on, then? Here is my question: How can I find out the dates for upcoming KSK or ZSK rollovers? This I couldn't find in the documentation, sorry. Thanks and regards, Michael [1] I've been bitten by that subtle bug in mailing list processing system ;-) My questions regarding migration strategy has become obsolete in the meantime, because I managed to migrate successfully. Thanks to the great documentation of Knot I could help myself ;-)

2 roky, 8 měsíců

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GUI Frontends for Knot DNS Server

by Turritopsis Dohrnii Teo En Ming

Subject: GUI Frontends for Knot DNS Server Good day from Singapore, Are there any GUI frontends for configuring Knot DNS Server? I prefer GUI configuration interface. It is more efficient than command line interface (CLI). Thank you. Regards, Mr. Turritopsis Dohrnii Teo En Ming Targeted Individual in Singapore Blogs: https://tdtemcerts.blogspot.com https://tdtemcerts.wordpress.com

2 roky, 8 měsíců

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kresd not starting with lua error

by Mike Wright

Hello, Running knot-resolver 5.6.0-1 amd64 (latest available via apt) on debian-12 bookworm, fully upgraded. systemctl start kresd@1 fails to run. systemctl status kresd@1 shows the following errors: [system] error while loading config: ...b/x86_64-linux-gnu/knot-resolver/kres_modules/policy.lua:378: bad argument #1 to 'create' (table expected, got nil) (workdir '/var/lib/knot-resolver') Here is my kresd.conf. It had been running ok for a long time ( I don't recall making any changes) : - Default empty Knot DNS Resolver configuration in -*- lua -*- -- Bind ports as privileged user (root) -- net = { '127.0.53.0' } -- Switch to unprivileged user -- user('knot-resolver','knot-resolver') -- Unprivileged -- cache.size = 100*MB policy.add(policy.suffix(policy.FLAGS({'NO_CACHE'}), internalDomains)) policy.add(policy.suffix(policy.STUB({'127.53.0.0'}), internalDomains)) policy.TLS_FORWARD({ -- multiple servers can be specified for a single slice -- the one with lowest round-trip time will be used {'9.9.9.9', hostname='dns.quad9.net'}, {'149.112.112.112', hostname='dns.quad9.net'}, }) All help is greatly appreciated, Mike Wright

2 roky, 8 měsíců

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warning - a few lost e-mails to the mailing list

by David Vasek

Dear mailing list subscribers, due to a subtle bug in our mailing list processing system, a few emails sent to the mailing list <knot-dns-users(a)lists.nic.cz> over the past two years were blocked and awaiting approval without our knowledge. After filtering out spam, we will review what we believe is still relevant and reach out to the senders directly in the coming days. If your email did not pass through the moderation phase, please resend it to the list after the middle of next week. We are sorry for this issue. Our thanks go to Juha Suhonen who helped us discover the problem by pointing out that his email is still waiting. Thank you, Juha. Best regards, David Vašek, Knot DNS team

2 roky, 8 měsíců

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Knot DNS 3.3.4 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.4! This is a bugfix version with some enhancements. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.4 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 9 měsíců

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TSIG key in remote and acl

by Einar Bjarni Halldórsson

Hi, I’m updating our config files and I’m wondering if we need to set ‘key’ in remotes section, and in acl section? If I have this in my config: remote: - id: remote01 address: 127.0.0.1 key: my_key acl: - id: allow_transfer address: 127.0.0.1 key: my_key action: transfer zone: - domain: example.com acl: [ allow_transfer ] notify: [ remote01 ] Couldn’t I just remove key attribute from the remote, since the acl declares the address and key that are allowed to transfer the zone? .einar

2 roky, 9 měsíců

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Knot DNS 3.2.12 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.12! This version only backports some fixes from 3.3.3. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.2.12 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 10 měsíců

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Knot DNS 3.3.3 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.3! This is mostly a bugfix version. Upgrade is recommended for QUIC and TCP/XDP users. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.3 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 10 měsíců

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Knot DNS 3.2.11 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.11! This version only backports some fixes from 3.3.2. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.2.11 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 roky, 12 měsíců

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Message compression (was: Re: Knot DNS 3.3.2 release)

by Robert Edmonds

Daniel Salzman wrote: > Hello Knot DNS users, > > CZ.NIC has released Knot DNS 3.3.2! > > This version fixes various issues and introduces some features regarding IXFR. > Users of PKCS #11 keystore might appreciate improved signing performance using more thread. > > Note that the offline KSK mode requires explicit setting of `rrsig-refresh` on the KSK side! > > Changelog: > https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.3.2/NEWS Hi, I'm interested in this change: - knotd: failed to sign RRSet that fits to 64k only if compressed Which seems to be this commit: https://gitlab.nic.cz/knot/knot-dns/-/commit/f55037f6f39d0ddf6debac47fe168d… "libknot/knot: allow uncompressed wire conversion of rrset that fits to 64k only when compressed" It's not totally clear to me, but it seems like this would allow an RRset (or individual RR, if the number of RRs in the RRset is 1?) that, exceeds 64K, if name compression would reduce the size on the wire to <64K? (And the 64K isn't measured by just the RDATA/RDLEN fields, but rather the whole wire serialization of the record set, including owner name, type, class, TTL, etc.) If so, is this a safe and/or interoperable thing to do? DNS implementations are required to implement decompression, but compression is optional (RFC 1035 § 4.1.4). So a resolver might receive a compressed RRset, decompress it, and then be unable to represent that RRset to clients if it doesn't implement compression, or, more likely, implements compression but uses an algorithm that generates less optimal compression targets than the one used by the original nameserver. Or am I misunderstanding what this commit is doing? Thanks! -- Robert Edmonds edmonds(a)debian.org

3 roky

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Knot DNS 3.3.2 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.2! This version fixes various issues and introduces some features regarding IXFR. Users of PKCS #11 keystore might appreciate improved signing performance using more thread. Note that the offline KSK mode requires explicit setting of `rrsig-refresh` on the KSK side! Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.3.2/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky

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Knot DNS 3.3.1 and 3.2.10 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.1 and 3.2.10! These versions fix several bugs. Upgrade is recommended. Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.3.1/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.10/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 1 měsíc

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Knot DNS 3.3.0 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.0! This version brings full DNS/XFR over QUIC support, multi-signer operation mode, and many more. See the changelog. Debian and Ubuntu users can download the packages from a new repository https://pkg.labs.nic.cz/doc/?project=knot-dns This repository is common to both distributions and Knot versions (older versions must be pinned). Additionally, the repository will contain some historical Knot versions. Prometheus exporter https://github.com/salzmdan/knot_exporter (a fork of https://github.com/ghedo/knot_exporter) has been replaced with https://pypi.org/project/knot-exporter/ and distribution package knot-exporter (currently for Debian and Ubuntu). Today Knot DNS 3.1 reached its End-of-life! Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.3.0/NEWS Migration: https://www.knot-dns.cz/docs/latest/html/migration.html#upgrade-3-2-x-to-3-… Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 2 měsíce

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Understanding block-notify-after-transfer

by Jan-Piet Mens

Hello! I have a Knot 3.2.5 server running here which, for most zones, acts as a bump-in-the-wire signer, and it's doing exactly what I expect it to do. The same server carries a few secondary zones which are not signed, and I notice that when Knot transfers these zones in, it doesn't NOTIFY its secondaries, something which works fine for DNSSEC signed zones. The following configuration is in place: remote: - id: pdns address: 192.168.25.45@53 key: dsupload block-notify-after-transfer: on # <------- automatic-acl: on template: - id: default zonefile-load: difference file: "%s" serial-policy: dateserial master: pdns catalog-role: member catalog-zone: katz1 acl: [ xfr, notify_from_pdns, xfer_to_bind ] notify: [ s1, s2, s3 ] policy: - id: manualHSM manual: on keystore: thales cds-cdnskey-publish: rollover ksk-submission: ds_checker ds-push: pdns zone: - domain: sig.example dnssec-policy: manualHSM dnssec-signing: on - domain: notsig.example dnssec-signing: off When sig.example is transferred in, Knot signs it, NOTIFYs its secondaries (s1--s3), they XFR the zone and all's well. When the unsigned notsig.example is transferred in, the logs indicate Knot is seeing the new serial, and that's it; the secondaries are not NOTIFYd. (I can manually `knotc notify', but that's not the point.) Setting `block-notify-after-transfer: off' on the remote remediates this. Knot then does NOTIFY its secondaries for the unsigned zone (and for the signed zone). The documentation states: "When incoming AXFR/IXFR from this remote (as a primary server), suppress sending NOTIFY messages to all configured secondary servers." However, if I swich it off (i.e. enable notification), I do not see the NOTIFY when knot initially transfers the unsigned zone which is then signed and hence then notified. Is this behavior expected, and have I interpreted it correctly? Thanks & best regards, -JP

3 roky, 2 měsíce

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Knot DNS 3.2.9 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.9! This is a bug fix version. Upgrade is recommended. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.9/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 3 měsíce

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Is it safe to alter dnssec-policy for a zone?

by Jan-Piet Mens

I have a zone for which I'd like to ensure an admin cannot mistakenly kick off a KSK rollover, so I am considering setting configuring its dnssec-policy to one with `manual: on' which prevents even a `knotc zone-key-rollover' on it. I have experimented with switching `manual: on' to `manual: off', and the idea seems to work. I have also apparently successfully been able to alter `ksk-lifetime', and have not noticed anything going wrong. Based on this, I wish to know if it is considered safe to alter many (all?) of a policy's settings, as long as neither algorithm nor key sizes are changed, and whether it is safe to alter the policy itself (i.e. also change a policy name for a zone). ksk-lifetime, delays, rrsig-lifetimes, ksk-submission, etc.: can all these be changed without breaking signing of a zone? Thank you & regards, -JP

3 roky, 3 měsíce

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zone event 'flush' on catalog?

by Jan-Piet Mens

Hello! I have here a catalog zone with roughly 230 member zones in it, and I occasionally see the following warning/error in the log: 2023-07-12T18:01:17+0200 warning: [k-catalog.] failed to update zone file (operation not permitted) 2023-07-12T18:01:17+0200 error: [k-catalog.] zone event 'flush' failed (operation not permitted) The catalog itself appears to work correctly; it's transferred to secondary BIND servers and they correctly process member zones. template: - id: default storage: "..." zonefile-load: difference file: "%s" serial-policy: dateserial master: pdns catalog-role: member catalog-zone: k-catalog acl: [ xfr, notify_from_pdns, xfer_to_bind ] - id: catzonetemplate catalog-role: generate acl: xfer_to_bind zone: - domain: k-catalog semantic-checks: off template: catzonetemplate journal-content: none acl: [ xfr, xfer_to_bind ] While pasting the configuration it occurs to me it might be due to there not being a 'backing' file for the catalog. Is that the problem? Is it even possible on a catalog-role:generate to have a file? Thanks for your help. -JP

3 roky, 3 měsíce

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catalog-role:interpret broken since upgrade to knot 3.2.6

by Daniel Gröber

Hi Knotty people, I've started uprading my infrastructure to Debian 12 which comes with knot 3.2.6 (instead of 3.0.5) and since the upgrade my catalog zone configuration doesn't seem to work anymore. I have this in knot.conf: zone: - domain: dxld.catalog catalog-role: interpret catalog-template: dxld-master template: dxld-master dxld.catalog gets loaded properly, `knotc zone-read dxld.catalog`: [dxld.catalog.] dxld.catalog. 0 SOA ns0.dxld.at. hostmaster.dxld.at. 2023070601 900 300 86400 300 [dxld.catalog.] version.dxld.catalog. 0 TXT "2" [dxld.catalog.] zones.dxld.catalog. 0 PTR dxld.at. [dxld.catalog.] zones.dxld.catalog. 0 PTR dxld.net. [dxld.catalog.] zones.dxld.catalog. 0 PTR darkboxed.org. but the zones pointed to don't get instantiated (as seen by `knotc zone-status`). Any ideas what could have changed to break this? Thanks, --Daniel

3 roky, 3 měsíce

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Knot DNS 3.2.8 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.8! This is a bug fix version. Upgrade is recommended for users of version 3.2.7 with journal enabled. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.8/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 4 měsíce

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Failed to load journal (loop detected)

by Ondřej Caletka

Hey, after an (unattended) upgrade to 3.2,7, one of my zones (the one that does rapid KSK rollovers) failed to load. Trying ro reload emits these errors in the log: info: [83.204.91.in-addr.arpa.] zone file parsed, serial 1622013488 error: [83.204.91.in-addr.arpa.] failed to apply journal changes, serial 1622013488 -> 1686209286 (loop detected) 2023-06-23T12:11:57+0200 error: [83.204.91.in-addr.arpa.] failed to apply journal changes, serial 1622013488 -> 1686209286 (loop detected) warning: [83.204.91.in-addr.arpa.] failed to load journal (loop detected) 2023-06-23T12:11:57+0200 warning: [83.204.91.in-addr.arpa.] failed to load journal (loop detected) info: [83.204.91.in-addr.arpa.] zone not found error: [83.204.91.in-addr.arpa.] zone event 'load' failed (not exists) 2023-06-23T12:11:57+0200 error: [83.204.91.in-addr.arpa.] zone event 'load' failed (not exists) Calling `kjournalprint 83.204.91.in-addr.arpa` yields 600 lines of journal full of both additions and deletions, nothing seems particularly wrong. Is there anything I should try before purging the journal and starting from scratch? There are other zones on the same server with similar config that just work normally, so I guess this is somehow related to the size of the journal for this zone, which rotates DNSSEC keys very often. -- Cheers, Ondřej Caletka

3 roky, 4 měsíce

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TCP requirement for catalog zones breaks interoperability

by Matthew Pounsett

The 3.0 documentation for catalog zones says the following: «The difference is that standard DNS queries to a catalog zone are answered with REFUSED as though the zone doesn’t exist, unless querying over TCP from an address with transfers enabled by ACL.» This seems like an odd requirement, and it breaks interoperability with other vendors' authoritative servers. BIND, for example, does not send the SOA check for a zone transfer over TCP, and so it's impossible to use a Knot primary and BIND secondary with catalog zones. Is there some way to work around this?

3 roky, 4 měsíce

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Knot DNS 3.2.7 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.7! This is a bugfix version with some improvements. Please note that the 3.3.0 version will be released in August and the 3.1 branch will no longer be officially supported. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.7/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 4 měsíce

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Monitor journal usage

by Einar Bjarni Halldórsson

Hi, Yesterday we got hit by the per-zone journal becoming full [1] As a result we're looking into how we can monitor the status to warn us if we're near the journal limits, but I can't find a way to report the currant journal usage (global and per-zone). Any ideas? [1] https://gitlab.nic.cz/knot/knot-dns/-/issues/842

3 roky, 5 měsíců

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Knot DNS 3.2.6 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.6! This is mostly a bugfix version with a few improvements. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.6/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 6 měsíců

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kresd 5.4.4 socket bug

by Mike Wright

Hi, Just upgraded knot-resolver on ubuntu-22.04. It installs and runs but shows that the socket is not where it thinks it is. Socket is at /run/knot-resolver/control@1 but the new version is looking for it at /run/knot-resolver/control/1 systemctl status is available here: https://pastebin.com/56g22e2a Thanks for the great software! Mike Wright

3 roky, 8 měsíců

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Why does knot need so much prodding to XFR and sign my zones?

by Jan-Piet Mens

Hello! Knot 3.2.0 with a Thales HSM configured this way: (btw, I am not obfuscating addresses or zone names -- these are actual testing names :) keystore: - id: thales backend: pkcs11 config: "pkcs11:token=XX;pin-value=XXX /opt/nfast/toolkits/pkcs11/libcknfast.so" key-label: on policy: - id: manualHSM keystore: thales single-type-signing: off manual: on zone: - domain: tt05 dnssec-signing: on dnssec-policy: manualHSM master: pdns acl: [ xfr, notify_from_pdns ] The zone `tt05' exists on the primary and can be transferred, as the following logs will show. I start off by generating a KSK and a ZSK, and verify that the keys are actually on the HSM: $ keymgr tt05 generate algorithm=8 size=2048 ksk=yes zsk=no 579f877d1739efb7bcf551e41c8777e965f8416f $ keymgr tt05 generate algorithm=8 size=2048 ksk=no zsk=yes eb8ef53ebffbd9950bfa914f7f2b0f1cd43bbe63 $ cklist -n | grep tt05 CKA_LABEL "tt05. KSK" CKA_LABEL "tt05. ZSK" I now reload Knot, and at this point I am actually expecting the server to "see" the new zone, get the keys, perform the transfer (XFR) and sign the zone. But all that doesn't happen: $ knotc reload Reloaded 2023-02-09T12:10:10+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, started 2023-02-09T12:10:10+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, finished, 0.00 seconds, 3 messages, 377 bytes 2023-02-09T12:10:10+0100 info: [tt05.] DNSSEC, key, tag 38930, algorithm RSASHA256, KSK, public, active 2023-02-09T12:10:10+0100 info: [tt05.] DNSSEC, key, tag 511, algorithm RSASHA256, public, active 2023-02-09T12:10:10+0100 error: [tt05.] DNSSEC, failed to load private keys (not exists) 2023-02-09T12:10:10+0100 error: [tt05.] DNSSEC, failed to load keys (not exists) 2023-02-09T12:10:10+0100 info: [tt05.] DNSSEC, next signing at 2023-02-09T13:10:10+0100 2023-02-09T12:10:10+0100 error: [tt05.] refresh, failed (not exists) 2023-02-09T12:10:10+0100 error: [tt05.] zone event 'refresh' failed (not exists) In the above, I don't understand why it's failed to load the keys. My _assumption_ is that the server has enumerated the keys from the HSM but did that before the two keys for this zone were created. Invoking `knotc zone-keys-load' doesn't alter the situation. I do understand the 'refresh' failing, as the zone tt05 doesn't as yet exist on this knot secondary. So I initiate a zone transfer: $ knotc zone-retransfer tt05 OK 2023-02-09T12:11:04+0100 info: [tt05.] control, received command 'zone-retransfer' 2023-02-09T12:11:04+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, started 2023-02-09T12:11:04+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, finished, 0.00 seconds, 3 messages, 377 bytes 2023-02-09T12:11:04+0100 info: [tt05.] DNSSEC, key, tag 38930, algorithm RSASHA256, KSK, public, active 2023-02-09T12:11:04+0100 info: [tt05.] DNSSEC, key, tag 511, algorithm RSASHA256, public, active 2023-02-09T12:11:04+0100 error: [tt05.] DNSSEC, failed to load private keys (not exists) 2023-02-09T12:11:04+0100 error: [tt05.] DNSSEC, failed to load keys (not exists) 2023-02-09T12:11:04+0100 info: [tt05.] DNSSEC, next signing at 2023-02-09T13:11:04+0100 2023-02-09T12:11:04+0100 error: [tt05.] refresh, failed (not exists) 2023-02-09T12:11:04+0100 error: [tt05.] zone event 'refresh' failed (not exists) It is clear that the transfer succeeds (the logs on the primary corroborate this), and knot apparently knows the correct keys to use for the zone. Why is it not signing it? $ knotc zone-sign tt05 OK 2023-02-09T12:11:38+0100 info: [tt05.] control, received command 'zone-sign' 2023-02-09T12:11:38+0100 info: [tt05.] DNSSEC, dropping previous signatures, re-signing zone 2023-02-09T12:11:38+0100 error: [tt05.] zone event 're-sign' failed (invalid parameter) I now restart the server: # <restart knotd> 2023-02-09T12:12:16+0100 info: Knot DNS 3.2.0 starting 2023-02-09T12:12:16+0100 info: loaded configuration file '/etc/knot.conf', mapsize 500 MiB 2023-02-09T12:12:16+0100 info: using UDP reuseport, incoming TCP Fast Open 2023-02-09T12:12:16+0100 info: binding to interface 10.24.34.16@5353 2023-02-09T12:12:16+0100 info: changed directory to / 2023-02-09T12:12:16+0100 info: loading 7 zones 2023-02-09T12:12:16+0100 info: [tt05.] zone will be loaded 2023-02-09T12:12:16+0100 info: starting server 2023-02-09T12:12:18+0100 info: [tt05.] failed to parse zone file '/var/zones/tt05' (not exists) Here again, I understand it cannot parse the zone, because the transfer hasn't actually been comitted to disk. So I manually transfer: $ knotc zone-retransfer tt05 OK 2023-02-09T12:13:23+0100 info: [tt05.] control, received command 'zone-retransfer' 2023-02-09T12:13:23+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, started 2023-02-09T12:13:23+0100 info: [tt05.] AXFR, incoming, remote 192.168.33.31@53, finished, 0.00 seconds, 3 messages, 377 bytes 2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, key, tag 38930, algorithm RSASHA256, KSK, public, active 2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, key, tag 511, algorithm RSASHA256, public, active 2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, signing started 2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, successfully signed 2023-02-09T12:13:23+0100 info: [tt05.] DNSSEC, next signing at 2023-02-23T11:13:24+0100 2023-02-09T12:13:23+0100 info: [tt05.] refresh, remote 192.168.33.31@53, zone updated, 0.44 seconds, serial none -> 2023010100, remote serial 2023010100, expires in 604800 seconds 2023-02-09T12:13:23+0100 info: [tt05.] zone file updated, serial 2023010100 And now the zone is signed. Is there some way to 'streamline' this? :-) Or am I just doing something wrong or being too impatient? Best regards, -JP

3 roky, 8 měsíců

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Knot DNS 3.2.5 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.5! This is mostly a bugfix version. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.5/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 8 měsíců

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PKCS#11 label is not set on keys created by Knot

by Jan-Piet Mens

I note that the key label is not set when Knot generates new keys via PKCS#11. Invoking `p11tool --list-all' shows a key as Object 449: URL: pkcs11:model=;manufacturer=nCipher%20Corp.%20Ltd;serial=xxx;\ token=YYY;\ id=%04%66%D0%9C%0D%9E%24%D9%79%0A%17%D3%5D%A0%CC%5A%3F%E2%A3%26;\ type=public Type: Public key (RSA-2048) Label: ID: 04:66:d0:9c:0d:9e:24:d9:79:0a:17:d3:5d:a0:cc:5a:3f:e2:a3:26 The ID is that which `keymgr list' displays (with colons in it), but the label is empty. Is this by design? Would it be possible for Knot to actually set the label (e.g. zone name - key type: example.com-ksk)? Best regards, -JP

3 roky, 8 měsíců

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Knot DNS 3.2.4 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.4! This version improves catalog zone performance and fixes some issues mostly related to zone transfers. Update from previous 3.2.x versions is recommended if primary nameserver isn't Knot DNS. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.4/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 10 měsíců

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Knot DNS 3.2.3 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.3! This version fixes broken knsupdate and some QUIC-related issues. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.3/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 roky, 11 měsíců

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knsupdate Segmentation fault

by Bastien Durel

Hello, Since I upgraded to 3.2.2-cznic.1~bullseye, my scripts using knsupdate fails, on every machine they run on. I can reproduce this with gdb, here is the trace I get in this case : Starting program: /usr/bin/knsupdate -k /etc/letsencrypt.sh/hooks/tsig.key /tmp/tmp.17EBRdeI8j [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Program received signal SIGSEGV, Segmentation fault. 0x000055555556161c in net_send (net=net@entry=0x7ffffffcbb80, buf=0x555555592a10 "\345\327(", buf_len=196) at utils/common/netio.c:587 587 utils/common/netio.c: No such file or directory. (gdb) where #0 0x000055555556161c in net_send (net=net@entry=0x7ffffffcbb80, buf=0x555555592a10 "\345\327(", buf_len=196) at utils/common/netio.c:587 #1 0x000055555555adee in pkt_sendrecv (params=params@entry=0x7ffffffcbdd0) at utils/knsupdate/knsupdate_exec.c:456 #2 0x000055555555ba01 in cmd_send (lp=<optimized out>, params=0x7ffffffcbdd0) at utils/knsupdate/knsupdate_exec.c:851 #3 0x000055555555b3e6 in knsupdate_process_line (line=line@entry=0x5555555755e0 "send", params=params@entry=0x7ffffffcbdd0) at utils/knsupdate/knsupdate_exec.c:498 #4 0x000055555555b5ed in knsupdate_process_line (params=0x7ffffffcbdd0, line=0x5555555755e0 "send") at utils/knsupdate/knsupdate_exec.c:486 #5 process_lines (params=params@entry=0x7ffffffcbdd0, input=input@entry=0x5555555910f0) at utils/knsupdate/knsupdate_exec.c:527 #6 0x000055555555bd3e in knsupdate_exec (params=params@entry=0x7ffffffcbdd0) at utils/knsupdate/knsupdate_exec.c:575 #7 0x0000555555559dc9 in main (argc=<optimized out>, argv=0x7fffffffe548) at utils/knsupdate/knsupdate_main.c:35 The nsupdate script (/tmp/tmp.17EBRdeI8j) is here (with truncated TXT) : server 10.42.42.21 zone durel.eu. origin durel.eu. ttl 600 add _acme-challenge.ns.durel.eu. 600 in TXT "qLH_KkbQ_IUVr[...]7rs-iUE" send quit As I can reproduce this with any tsig key, I can provide a core if you need it. -- Bastien Durel

3 roky, 11 měsíců

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Knot DNS 3.2.2 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.2! This version brings a few new features and some fixes. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.2/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

3 roky, 12 měsíců

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Knot DNS 3.2.1 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.1! This version adds compatibility with libbpf 1.0 and fixes mostly XDP-related issues. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.1/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

4 roky, 1 měsíc

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policy.rrsig-refresh in Knot 3.2.0

by André Keller

Good morning, In Knot 3.2.0 the rrsig-refresh default changed, excerpt changlog: knotd: default value for 'policy.rrsig-refresh' is propagation delay + zone maximum TTL I'd like to understand the rationale behind this change and whether or not we should tune this parameter in our deployment. We currently have monitoring in place to ensure that we always serve valid signatures. In my understanding with the old defaults < 3.2.0 of rrsig-refresh of 7d and rrsig-lifetime of 14d, we always ended up with signatures that were at least valid for 7 days. As I understand, with the new defaults, signatures might be refreshed way closer to their expiry date. This makes me a bit uneasy, as if there are issues with signing this gives us hardly any time to react and fix potential issues before the current signatures expire. I assume setting rrsig-refresh explicitly to 7d would restore the old behavior, but I'm wondering if this is somehow bad practice and if we are overly paranoid with our monitoring. How do other people handle this? Are there any downsides of setting a higher value of rrsig-refresh that we are not aware of? Regards André

4 roky, 1 měsíc

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knot 3.2 fails to access HSM key

by Bastien Durel

Hello, I tried to upgrade to knot 3.2 using the debian packages from https://deb.knot-dns.cz/knot-latest bullseye/main, but the server does not use my HSM anymore. All zones fails with : août 22 14:38:13 arrakeen knotd[1285865]: info: [durel.org.] zone file parsed, serial 2021120479 août 22 14:38:13 arrakeen knotd[1285865]: error: [durel.org.] DNSSEC, failed to initialize signing context (PKCS #11 token not available) août 22 14:38:13 arrakeen knotd[1285865]: 2022-08-22T14:38:13+0200 error: [durel.org.] DNSSEC, failed to initialize signing context (PKCS #11 token not available) août 22 14:38:13 arrakeen knotd[1285865]: 2022-08-22T14:38:13+0200 error: [durel.org.] zone event 'load' failed (PKCS #11 token not available) août 22 14:38:13 arrakeen knotd[1285865]: error: [durel.org.] zone event 'load' failed (PKCS #11 token not available) debug log does not seems to print more details about error keystore is defined as : keystore: - id: hsmkey backend: pkcs11 config: "pkcs11:pin-value=REDACTED /usr/lib/x86_64-linux-gnu/opensc-pkcs11.so" The HSM itself is an USB key from CardContact.de Downgrading to 3.1.9-cznic.1~bullseye re-enable signing Is there anything I can do to debug/solves this problem ? Regards, -- Bastien

4 roky, 2 měsíce

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Knot DNS 3.2.0 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.2.0! This version brings various XDP-related features and improvements (namely QUIC and TCP) and many more. See the changelog. As usual, today Knot DNS 3.0 reached its End-of-life. The official repositories are being updated this way: current stable -> 3.2.0, previous stable -> 3.1.9. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.0/NEWS Migration: https://www.knot-dns.cz/docs/3.1/html/migration.html#upgrade-3-1-x-to-3-2-x Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

4 roky, 2 měsíce

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When knot delete old ksk key ?

by libor.peltan

Hi, thank you for contacting us with your issues with Knot DNS. However, you have hit wrong channel: knot-resolver-users mailing-list is intended for users of Knot Resolver. I'm sending this reply already to proper channel. You correctly pointed out that Knot did not delete old key after the delete-delay period. This seems to be an effect of an actually intentional, but perhaps tricky feature: Knot postpones this (relatively unnecessary) key deletion until next signing process. The point is, that initializing the whole "signing machinery" just in order to purge a deleted (marked as such) key might be an overkill (mostly on configurations with many many zones). You can see the next planned singing event when calling `knotc zone-status` or when inspecting the logfile for logs of the previous signing event. Please let me know if the deleted key disappears once the zone is re-signed. I guess it might take up to a week, since this long it takes between RRSIGs re-creation according to your configuration. If you need to delete the key immediately, you can use keymgr utility, or it might be also done with `knotc zone-keys-load` (basically triggering the zone signing process out of schedule). Thank you, Libor

4 roky, 2 měsíce

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Knot DNS 3.1.9 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.9! It's a maintenance version with some fixes and improvements. Please note that 3.2.0 will be released in two weeks and 3.0 will no longer be officially supported. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.9/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

4 roky, 2 měsíce

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db.storage

by Thomas

Hi, my knot installation (3.0.5) gives me this notice: notice: config, non-default 'template[default].storage' detected, please configure also 'db.storage' to avoid compatibility issues with future versions I have searched the docs to find out what I have to do, but did not find any specific information. Can you give me a hint what needs to be done here? Thanks a lot, Thomas

4 roky, 4 měsíce

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keymgr del-all-old not only for offline KSK?

by Jan-Piet Mens

The documentation for `keymgr' says that the subcommand `del-all-old' is related to offline KSK, but it also seems to work for online KSK. Moments ago I had the following keys of which e381* had just been marked as removed: $ keymgr -c knot.conf tm list -b iso e381198aea254a1dbceb3c5b153cbefaa98c959a 31943 KSK ECDSAP256SHA256 publish=2022-05-12T11:43:56Z ready=2022-05-12T11:43:56Z active=2022-05-12T11:43:56Z retire=2022-05-12T12:35:42Z revoke=2022-05-12T12:33:42Z remove=2022-05-12T12:37:42Z d68e6803daa3e3ee34dd07d6966df0c402594fb2 26288 ZSK ECDSAP256SHA256 publish=2022-05-12T12:28:18Z active=2022-05-12T12:28:18Z b0cc879e9b9f5faae647c7019a12821e62150378 62610 KSK ECDSAP256SHA256 publish=2022-05-12T12:30:49Z ready=2022-05-12T12:30:49Z active=2022-05-12T12:30:49Z $ keymgr -c knot.conf tm del-all-old OK $ keymgr -c knot.conf tm list -b iso d68e6803daa3e3ee34dd07d6966df0c402594fb2 26288 ZSK ECDSAP256SHA256 publish=2022-05-12T12:28:18Z active=2022-05-12T12:28:18Z b0cc879e9b9f5faae647c7019a12821e62150378 62610 KSK ECDSAP256SHA256 publish=2022-05-12T12:30:49Z ready=2022-05-12T12:30:49Z active=2022-05-12T12:30:49Z and the PEM key file has also been removed. Is this to be expected? Would it be a good idea to add a note to the documentation clarifying this? Best regards, -JP

4 roky, 5 měsíců

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manual KSK and automatic ZSK rollovers

by Jan-Piet Mens

Hello, I'd like to be able to do automatic ZSK and manual KSK rollovers. Basically the KSK should have an endless validity but I might want to roll it with (manually-trigerred) RFC 5011 semantics. It it permissible to have a policy such as shown below and then explicitly use `keymgr' commands to generate new keys and set `revoke', `retire' and `remove' timers on the older key? Testing indicates that it works as desired, I'm just unsure whether key manipulation is permitted. policy: - id: autoHSM keystore: pemstore single-type-signing: off manual: off ksk-shared: off ksk-lifetime: 0 zsk-lifetime: 30d cds-cdnskey-publish: rollover Thank you, -JP

4 roky, 5 měsíců

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keymgr: list output in JSON?

by Jan-Piet Mens

Hello, keymgr(8) lists keys in plain text which is fine for processing with awk(1) et.al. Are there any plans to make it output JSON? I'm thinking along the lines of making parsing future-proof: [ { "id": "a982d72174a48a3ef083a97e5aae02cc47f58762", "ksk": true, "zsk": false, "key_tag": 61676, "algo": 8, "size": 2048, "public-only": false, "pre-active": 0, "publish": 1652161461, "ready": 1652161581, "active": 1652161642, "retire-active": 1652168902, "retire": 0, "post-active": 0, "revoke": 0, "remove": 1652168962 } ] keymgr_list_keys() calls either of print_key_full() / print_key_brief() to do the work, and I think it would be quite easy to add support for JSON. Is this something I should make happen? -JP

4 roky, 5 měsíců

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Importing KSK/ZSK from HSM/PKCS#11 and rolling thereafter

by Jan-Piet Mens

Hello, I need to migrate away from an HSM-backed OpenDNSSEC installation which uses a Thales nCipher for key storage and am experimenting with Knot DNS 3.1.8 (on CentOS 7, FWIW). I've compiled Knot, and it is able to access said HSM via PKCS#11. I have configured a zone with a manual policy. policy: - id: manualHSM keystore: thales single-type-signing: on manual: on After importing keys from the HSM with `keymgr import-kcs11', knotd launches and signs the zone with KSK/ZSK as expected. What I would then like to have happen is to have periodic ZSK rollovers as well as periodic KSK rollovers. In order to accomplish this I have changed the zone's policy to policy: - id: autoHSM keystore: thales single-type-signing: off manual: off algorithm: rsasha256 ksk-size: 2048 zsk-size: 1024 zone-max-ttl: 60 dnskey-ttl: 60 propagation-delay: 60 nsec3: on nsec3-iterations: 0 nsec3-salt-length: 0 nsec3-salt-lifetime: 0 ksk-lifetime: 7200 zsk-lifetime: 3600 A restart of knotd then begins by creating a new ZSK and rolling it, and the KSK is rolled automatically after 7200 seconds. (These timers are for testing only.) So far no complaints whatsoever -- this is working exactly as I had hoped it would. I am assuming that it is permissible to change a zone's policy in flight. What I'd like is confirmation that the KSK roll will actually never occur immediately, but only after a first period has elapsed. Can I rely on this behavior, i.e. that the first KSK roll will occur only after a first `ksk-lifetime' period? Best regards, -JP

4 roky, 5 měsíců

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Knot DNS 3.1.8 and 3.0.11 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.8 and 3.0.11! Both versions fix quite a serious bug in the TSIG processing when the server can crash if the TSIG is malformed. If you don't use TSIG, you are not affected. Special thanks go to 0x34d for finding this bug! In addition to some other fixes, the 3.1.8 version introduces a new automatic ACL mode that can help simplify complex configurations. This mode is disabled by default! Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.8/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.0.11/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

4 roky, 6 měsíců

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public-only key makes DNSSEC signing fail

by Thomas

Hi, for the transition of a TLD I need to import the current providers KSK into my zone. I use the "keymgr import-pub" command for this. I have done that a few times in the past and it worked very well. I have now installed the most current version of Knot (3.0.10) and did the same procedure. But after importing the KSK the zone can't be signed anymore. It seems like Knot doesn't recognize that this imported key is a "public-only" key. Knot throws an error and complains that the private key could not be loaded. The zone's keys (.example) before the import of the KSK: # keymgr example list 0b94a3f9fef3ae531fc5ee1334ddd2876db7cd9a ksk=yes zsk=no tag=12595 algorithm=7 size=2048 public-only=no pre-active=0 publish=1650495677 ready=1650495677 active=1650659051 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 13cc082655ddf7160787ef945ad7edb6406bb70e ksk=no zsk=yes tag=05477 algorithm=7 size=1024 public-only=no pre-active=0 publish=1650495677 ready=0 active=1650495677 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 Imported the KSK with the following command: # keymgr example import-pub /etc/knot/public.key 2c135e77b7f48475a837ad0d28a9459f0e7ce621 OK The zone's keys (.example) after the import of the KSK: # keymgr example list 0b94a3f9fef3ae531fc5ee1334ddd2876db7cd9a ksk=yes zsk=no tag=12595 algorithm=7 size=2048 public-only=no pre-active=0 publish=1650495677 ready=1650495677 active=1650659051 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 13cc082655ddf7160787ef945ad7edb6406bb70e ksk=no zsk=yes tag=05477 algorithm=7 size=1024 public-only=no pre-active=0 publish=1650495677 ready=0 active=1650495677 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 2c135e77b7f48475a837ad0d28a9459f0e7ce621 ksk=yes zsk=no tag=35421 algorithm=7 size=2048 public-only=yes pre-active=0 publish=1650660072 ready=0 active=0 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 The imported key (tag 35421) has the flag "public-only=yes", as expected. But when I now sign the zone, the log shows this errors: Apr 22 20:43:24 lab-nic knotd[2831]: info: [example.] control, received command 'zone-sign' Apr 22 20:43:24 lab-nic knotd[2831]: info: [example.] DNSSEC, dropping previous signatures, re-signing zone Apr 22 20:43:24 lab-nic knotd[2831]: info: [example.] DNSSEC, key, tag 12595, algorithm RSASHA1_NSEC3_SHA1, KSK, public, active Apr 22 20:43:24 lab-nic knotd[2831]: info: [example.] DNSSEC, key, tag 35421, algorithm RSASHA1_NSEC3_SHA1, KSK, public, active+ Apr 22 20:43:24 lab-nic knotd[2831]: info: [example.] DNSSEC, key, tag 5477, algorithm RSASHA1_NSEC3_SHA1, public, active Apr 22 20:43:24 lab-nic knotd[2831]: error: [example.] DNSSEC, failed to load private keys (not exists) Apr 22 20:43:24 lab-nic knotd[2831]: error: [example.] DNSSEC, failed to load keys (not exists) Apr 22 20:43:24 lab-nic knotd[2831]: info: [example.] DNSSEC, next signing at 2022-04-22T21:43:24+0000 Apr 22 20:43:24 lab-nic knotd[2831]: error: [example.] zone event 'DNSSEC re-sign' failed (not exists) The imported key should not have the "active" flag: info: [example.] DNSSEC, key, tag 35421, algorithm RSASHA1_NSEC3_SHA1, KSK, public, active+ It seems to me that the imported key is not seen as a "public-only" key anymore and therefore Knot is looking for the corresponding private key, which of course fails. I attached an strace output, with the signing operation. But that doesn't seem to be helpful because the signing command itself doesn't fail. Thanks, Thomas

4 roky, 6 měsíců

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Knot DNS 3.1.7 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.7! This version primarily fixes incomplete implementation of the Offline KSK signing mode in the IXFR and DDNS processing. Please note that the online signing still doesn't support Offline KSK! Also various fixes and improvements regarding catalog zones are included. Our donation page newly accepts EUR and USD: https://donations.nic.cz/donate/?project=knot-dns Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.7/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

4 roky, 7 měsíců

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'remote' semantics

by Matthew Pounsett

Just to clarify some semantics of the config format. Is each individual 'remote' ID considered to be a single server, regardless of the number of addresses it has? For the notify case, it looks like knot will send to each address in a remote ID in serial, and stop as soon as one replies. That suggests the above semantics, but I wanted to make sure I'm interpreting this behaviour correctly before I complicate my config by adding a lot more remotes. I am currently treating each remote as an organisation, lumping all of that organisation's servers together under a single ID.

4 roky, 7 měsíců

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Monitoring for "waiting for DS submission"

by Matthew Pounsett

I'm trying to find a way to poll for any zones where knot is currently waiting on DS submission to the parent. I'm aware of the structured logging sent to systemd-journald but I see this as not particularly useful for monitoring, as the event could be missed by a dead daemon, bug in code, etc. I'd much prefer to be able to actively monitor states by polling. It looks like the only way I can do that right now is to run `keymgr list` and analyze the output. If I'm reading the documentation correctly, all I need to look for is a key that is `ksk=yes`, `ready != 0`, and `active = 0`. Does that seem correct? Am I missing something simpler? :)

4 roky, 8 měsíců

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Algorithm roll enhancement

by Matthew Pounsett

I have found a situation where I think the Knot behaviour around algorithm rolls could be better. It's one of those "prevent the user from hurting themselves" situations, in which I would have hurt myself if this had involved anything other than an old, unused zone. :) The suggestion is a simple one: when doing an automated algorithm roll, the KSK submission check should remain negative until the parental DS set exactly matches the set requested by the published CDS set (substitute DNSKEY/CDNSKEY as appropriate). In a situation where CDS scanning is not being done by my parent, I slipped up and only added the new DS record to the parent, leaving the old algorithm's DS record also present. Knot did its submission check, saw the new DS record, and happily continued on with the algorithm roll. This eventually led to a situation that was in violation of RFC 6840 § 5.11 [0]: A signed zone MUST include a DNSKEY for each algorithm present in the zone's DS RRset and expected trust anchors for the zone. I ended up with a situation where I had the new and old DS, but only the new DNSKEY [1]. This seems like a situation that could be avoided by extending the logic of the KSK submission check. In addition to saving users from themselves, it would also help if a situation occurred where the parent had a bug in their CDS processing implementation and failed to remove the old DS. [0]: <https://datatracker.ietf.org/doc/html/rfc6840#section-5.11> [1]: <https://dnsviz.net/d/dns-oarc.org/Yg7ZDw/dnssec/>

4 roky, 8 měsíců

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Start Warnings

by Günther J. Niederwimmer

Hello, what is wrong in my policy section? I can't found any in the docs ? Have I missing Parameters or .............. The Warning is, Feb 13 12:33:05 dns1 knotd[184636]: warning: config, policy[rsa2k].nsec3- iterations defaults to 10, since version 3.2 the default becomes 0 Feb 13 12:33:05 dns1 knotd[184636]: warning: config, policy[ececc1].nsec3- iterations defaults to 10, since version 3.2 the default becomes 0 Feb 13 12:33:05 dns1 knotd[184636]: 2022-02-13T12:33:05+0100 warning: config, policy[rsa2k].nsec3-iterations defaults to 10, since version 3.2 the default becomes 0 Feb 13 12:33:05 dns1 knotd[184636]: 2022-02-13T12:33:05+0100 warning: config, policy[ececc1].nsec3-iterations defaults to 10, since version 3.2 the default becomes 0 Feb 13 12:33:05 dns1 knotd[184636]: 2022-02-13T12:33:05+0100 warning: config, policy[ececc2].nsec3-iterations defaults to 10, since version 3.2 the default becomes 0 Feb 13 12:33:05 dns1 knotd[184636]: warning: config, policy[ececc2].nsec3- iterations defaults to 10, since version 3.2 the default becomes 0 my policy, policy: - id: rsa2k algorithm: RSASHA256 ksk-size: 4096 zsk-size: 2048 nsec3: on - id: ececc1 algorithm: ECDSAP256SHA256 nsec3: on - id: ececc2 algorithm: ecdsap384sha384 nsec3: on -- mit freundlichen Grüßen / best regards Günther J. Niederwimmer

4 roky, 8 měsíců

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Memory usage sky rockets

by Einar Bjarni Halldórsson

Hi, I've got a staging environment running, with two signers signing a staging version of the .is zone (~115k records). The staging servers are configured with 2 GB RAM and 4 CPU cores, running on FreeBSD 12.2. We've experienced that knot crashes because the server runs out of memory. The zone is configured with: zonefile-sync: -1 zonefile-load: difference-no-serial journal-content: all One of the signers, after an hour of running is showing 215 MB resident memory used. The other signer, that's been running for a whole day is showing 1582 MB resident memory. I attached a screenshot showing the amount of memory used over a period of time, and the graph shows that the amount of memory used very suddenly increases. I assume the servers are using a lot of memory for the journals, but I'd like to understand why the sudden increase in used memory, and what to expect about needed memory? .einar

4 roky, 8 měsíců

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DNS cookie not configured correctly?

by J. Echter

Hi, i have knot dns setup with dns cookie module enabled but if i check with dnsviz.net i always get: The server appears to support DNS cookies but did not return a COOKIE option. Relevant parts of my knot.conf: template: - id: default storage: "/var/lib/knot" dnssec-signing: on dnssec-policy: rsa2048 global-module: [ "mod-cookies", "mod-rrl/default" ] mod-rrl: - id: default rate-limit: 200 slip: 2 - domain: mydomain.de file: "/etc/knot/zones/mydomain.de.zone" notify: secondary acl: acl_secondary zonefile-load: difference I thought about maybe it's the slip: 2, but that didn't change anything if set to 1 Do you guys see anything obvious causing this "issue"? Thanks for your time Juergen

4 roky, 8 měsíců

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Knot DNS 3.1.6 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.6! It's mostly a maintenance version with some new features for those who need them. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.6/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

4 roky, 8 měsíců

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zonefile-sync and strange SOA serial

by Einar Bjarni Halldórsson

Hi, For many months now, we've been preparing new signers for our internal zones and eventually .is. We've got the first of our test zones live on the production signers, but some things are troubling us. This is the config we're using for zones: template: - id: default semantic-checks: on storage: "/usr/local/etc/knot" file: "zones/unsigned/%s/%s-soa" serial-policy: dateserial zonefile-sync: -1 zonefile-load: difference-no-serial journal-content: all notify: hidden_primary acl: hidden_primary_acl policy: - id: isnic algorithm: RSASHA256 ksk-size: 4096 zsk-size: 2048 ksk-lifetime: 365d zsk-lifetime: 30d propagation-delay: 1h rrsig-lifetime: 14d rrsig-refresh: 7d rrsig-pre-refresh: 1h --- zones/unsigned is stored in a git repo and changes are deployed by an ansible playbook that checks out the latest revision and reloads the zones. Someone pointed out that zonefile-load: difference-no-serial was risky for something as important as a TLD, but what is the alternative when doing automatic DNSSEC signing on zone data from git? Also, we turned off zonefile-sync, since our current deployment script overwrites the zonefile. Is there a way to load initial zone data from one file, but do zonefile-sync to another? We're seeing this in our logs: Jan 20 09:32:06 ht-signer01 knot[49715]: info: [pp.is.] zone file parsed, serial corrected 1970010100 -> 2022012000 Jan 20 09:32:06 ht-signer01 knot[49715]: info: [pp.is.] loaded, serial 2022011900 -> 2022012000 -> 2022011900, 3830 bytes Any idea what's happening on the second line? It's like knot wants to increment the serial, but then changes it's mind :) .einar

4 roky, 9 měsíců

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Knot DNS 3.1.5 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.5! - This version brings some new features useful for operators of many zones and fixes a few bugs. - Our Docker images are newly build with some hardening flags set, enabled dnstap in kdig, and with fast zone parser enabled. - Please note that the expiration of the GPG key for our Debian repositories (https://deb.knot-dns.cz/apt.gpg) has been extended: ``` pub rsa4096/0x8A0EFB02C84B1E9B 2019-03-14 [SC] [expires: 2026-11-11] Key fingerprint = 8C0A 90B7 DE9C AC3B 4A7B D579 8A0E FB02 C84B 1E9B uid Knot DNS Packaging <knot-dns(a)labs.nic.cz> ``` Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.5/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

4 roky, 10 měsíců

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RSASHA1 --> RSASHA256 question

by Chris

OK I recently decided to change the algorithm on all our domains from RSASHA1 to RSASHA256. Before making the change globally; I experimented with one domain. I did so by adding a new policy: CURRENT policy: - id: rsa1 algorithm: RSASHA1 ksk-size: 2048 zsk-size: 1024 dnskey-ttl: 43200 zsk-lifetime: 30d ksk-lifetime: 365d NEW (PROPOSED) policy: - id: rsa2 algorithm: RSASHA256 ksk-size: 2048 zsk-size: 2048 dnskey-ttl: 43200 zsk-lifetime: 30d ksk-lifetime: 365d DOMAIN TESTED ON # a-domain - domain: a-domain file: "masters/a-domain" zonefile-load: difference dnssec-signing: on # dnssec-policy: rsa1 dnssec-policy: rsa2 semantic-checks: on serial-policy: dateserial acl: [locals, remotes01, remotes03, remotes04] To preform the intended change. I first set the the current keys on the test domain to: retire=+1hr I then added the new policy and assigned it to the testing domain. Then restarted the knot service. After the hour and some had passed. I performed a keymgr a-domain del-all-old which removed the old algorithm (RSASHA1) keys. But I think this was a mistake. How would I best make this change? Is it enough to simply change algorithm: and knot will just do the right thing? Thanks! -- Chris

4 roky, 10 měsíců

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Migrate signed zone to knot

by Einar Bjarni Halldórsson

Hi, We're preparing to migrate our zones from OpenDNSSEC 1.4 to Knot DNS 3.1 (and eventually the .is zone). We've already migrated one unsigned zone to the new signers, but next on the list is first currently signed zone. We're going to migrate the zone by doing a key rollover, so we'll add DNSKEY records for the new keys to the zone on the old signer and vice versa. While we're migrating the zone we have to stop automatic key rollovers, and I planned to create a new policy 'dnssec_freeze' with `manual: on` and apply it to zones during migration. Am I correct that this will stop all automatic key rolloveres, but keep the signatures updated? The the migration is complete, DS records and delegations have been updated etc., I'll change the policy to an automatic policy. Will knot seamlessly start automatically rolling over keys according to the new policy? .einar

4 roky, 10 měsíců

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Failure importing a public key from BIND

by Luveh Keraph

I am trying to import a public key generated by BIND into Knot, when using the SoftHSM2 key store. I have the following pieces of information: In my knot.conf file: policy: - id: SoftHSMRSAPolicy algorithm: RSASHA256 ksk-size: 2048 zsk-size: 2048 ksk-lifetime: 7h zsk-lifetime: 6h dnskey-ttl: 12s zone-max-ttl: 15s keystore: SoftHSM zone: - domain: 00.mydomain.com storage: /srv/knot file: db.mydomain00 dnssec-signing: on dnssec-policy: SoftHSMRSAPolicy The public key is in a file named pubkey, and has the following contents: ; This is a zone-signing key, keyid 14694, for 00.mydomain.com. ; Created: 20211109192137 (Tue Nov 9 12:21:37 2021) ; Publish: 20211109192137 (Tue Nov 9 12:21:37 2021) ; Activate: 20211109192137 (Tue Nov 9 12:21:37 2021) 00.mydomain.com. IN DNSKEY 256 3 8 AwEAAd1XmDMiF4/WWW+lneSg2hScxQl TJHU/cIyBnDJDnW3MFkuyR7e+y3UqZScTXz5tfcGkDYGpqFqZ3+RgyN7A3ZAC3RsayivUuE9lec25IT97 jPZaTsHUjalDQjXkBhCIHBb79vVsz0SMZOeez78qzhRtpdkFYVNRcAW4EZVgdQAdiuJGeDEuxsaTkRnLwujnaqURyAzevqfQfjz319CPsYr4tN4K9nu2Fc0Sh+b5pdM6ejRieLnUUgZpuefRfgsSHJQErNe FevdtihLpq93r E5OARwmK0c4vyzgpmREloMJlwV+lrZdlKqZnnIZIXgkD+59Tjh0XZ72exdvonun4uG8= (The DNSKEY record is in a single line.) The command I am using to import this key is # ./keymgr 00.mydomain.com. import-pub ./pubkey This spins for a few seconds and then prints out: Error: file error Any ideas as to what it is that I am doing wrong? The command that I am invoking to import this public key is the following:

4 roky, 11 měsíců

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KSK rollover using alternate keystore

by Bastien Durel

Hello, Is there a way to perform a key rollover using a new keystore for the new KSK ? I'd like to switch from KASP DB pem files to HSM-backed keys I've tried to make a new zone test.test, using the default KASP, and then change the storage to HSM, but this leads to 'not exists' errors at reload : nov. 09 11:36:39 arrakeen knotd[2144032]: info: [test.test.] DNSSEC, key, tag 4164, algorithm ECDSAP384SHA384, KSK, public, ready, active+ nov. 09 11:36:39 arrakeen knotd[2144032]: info: [test.test.] DNSSEC, key, tag 15855, algorithm ECDSAP384SHA384, public, active nov. 09 11:36:39 arrakeen knotd[2144032]: error: [test.test.] DNSSEC, failed to load private keys (not exists) nov. 09 11:36:39 arrakeen knotd[2144032]: 2021-11-09T11:36:39+0100 error: [test.test.] DNSSEC, failed to load private keys (not exists) nov. 09 11:36:39 arrakeen knotd[2144032]: 2021-11-09T11:36:39+0100 error: [test.test.] DNSSEC, failed to load keys (not exists) nov. 09 11:36:39 arrakeen knotd[2144032]: 2021-11-09T11:36:39+0100 error: [test.test.] zone event 'DNSSEC re-sign' failed (not exists) nov. 09 11:36:39 arrakeen knotd[2144032]: error: [test.test.] DNSSEC, failed to load keys (not exists) nov. 09 11:36:39 arrakeen knotd[2144032]: info: [test.test.] DNSSEC, next signing at 2021-11-09T12:36:39+0100 nov. 09 11:36:39 arrakeen knotd[2144032]: error: [test.test.] zone event 'DNSSEC re-sign' failed (not exists) nov. 09 11:36:40 arrakeen knotd[2144032]: error: [test.test.] DNSSEC, failed to load private keys (not exists) nov. 09 11:36:40 arrakeen knotd[2144032]: 2021-11-09T11:36:40+0100 error: [test.test.] DNSSEC, failed to load private keys (not exists) nov. 09 11:36:40 arrakeen knotd[2144032]: 2021-11-09T11:36:40+0100 error: [test.test.] zone event 'DS check' failed (not exists) nov. 09 11:36:40 arrakeen knotd[2144032]: error: [test.test.] zone event 'DS check' failed (not exists) policy: - id: default algorithm: ECDSAP384SHA384 ksk-size: 384 zsk-size: 384 nsec3: on nsec3-salt-lifetime: 4d ksk-submission: validating-resolver - id: default_hsm keystore: hsmkey algorithm: ECDSAP384SHA384 ksk-size: 384 zsk-size: 384 nsec3: on nsec3-salt-lifetime: 4d ksk-submission: validating-resolver zone: - domain: "test.test." file: "test.test" # dnssec-policy: default dnssec-policy: default_hsm keymgr test.test list -> b63796b44dcfed7392639aec6fb4a7ca9ca446dd ksk=yes zsk=no tag=04164 algorithm=14 size=384 public-only=no pre-active=0 publish=1636454163 ready=1636454163 active=0 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 fdd7822a5498d6eda619092f01dffa41c285d00e ksk=no zsk=yes tag=15855 algorithm=14 size=384 public-only=no pre-active=0 publish=1636454163 ready=0 active=1636454163 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 knotc zone-key-rollover test.test ksk -> nov. 09 11:39:58 arrakeen knotd[2144032]: info: [test.test.] DNSSEC, key, tag 4164, algorithm ECDSAP384SHA384, KSK, public, ready, active+ nov. 09 11:39:58 arrakeen knotd[2144032]: info: [test.test.] DNSSEC, key, tag 15855, algorithm ECDSAP384SHA384, public, active nov. 09 11:39:58 arrakeen knotd[2144032]: info: [test.test.] DNSSEC, key, tag 43192, algorithm ECDSAP384SHA384, KSK, public, active+ nov. 09 11:39:58 arrakeen knotd[2144032]: error: [test.test.] DNSSEC, failed to load private keys (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: 2021-11-09T11:39:58+0100 error: [test.test.] DNSSEC, failed to load private keys (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: 2021-11-09T11:39:58+0100 error: [test.test.] DNSSEC, failed to load keys (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: error: [test.test.] DNSSEC, failed to load keys (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: info: [test.test.] DNSSEC, next signing at 2021-11-09T12:39:51+0100 nov. 09 11:39:58 arrakeen knotd[2144032]: 2021-11-09T11:39:58+0100 error: [test.test.] zone event 'DNSSEC re-sign' failed (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: error: [test.test.] zone event 'DNSSEC re-sign' failed (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: error: [test.test.] DNSSEC, failed to load private keys (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: 2021-11-09T11:39:58+0100 error: [test.test.] DNSSEC, failed to load private keys (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: 2021-11-09T11:39:58+0100 error: [test.test.] zone event 'DS check' failed (not exists) nov. 09 11:39:58 arrakeen knotd[2144032]: error: [test.test.] zone event 'DS check' failed (not exists) keymgr test.test list -> b63796b44dcfed7392639aec6fb4a7ca9ca446dd ksk=yes zsk=no tag=04164 algorithm=14 size=384 public-only=no pre-active=0 publish=1636454163 ready=1636454163 active=0 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 fc4c2a4b6b43d0428a68b4e130232d261a5ee189 ksk=yes zsk=no tag=43192 algorithm=14 size=384 public-only=no pre-active=0 publish=1636454391 ready=0 active=0 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 fdd7822a5498d6eda619092f01dffa41c285d00e ksk=no zsk=yes tag=15855 algorithm=14 size=384 public-only=no pre-active=0 publish=1636454163 ready=0 active=1636454163 retire-active=0 retire=0 post-active=0 revoke=0 remove=0 The DNSKEY was not changed when the new ksk was introduced, so I guess it's not visible : dig +dnssec @ns.geekwu.org dnskey test.test test.test. 86400 IN DNSKEY 256 3 14 f06gYOe4uyphbGuBAWvDFnkQDY8+3SrM4e8k9o86AcuD3OL14chmn+34 np03/qFI5HCxG688v+Krnm8MbOc+eEaCBHisJpWo8j9+ot/ct2rfJln3 96rNcQXCzUNzDaSZ test.test. 86400 IN DNSKEY 257 3 14 7qUXsDfMWc8D6rp9Rvt2QOORZi7/pTEclBawadkauau3xA9iTBwOsZ0G 0/6/O9PqrdQBrHP2K4sODOLSI685sOz5lZGRaUqPkuiZe2Gj1OwXsUz1 495W+GmnoAz26YHh test.test. 86400 IN RRSIG DNSKEY 14 2 86400 20211123103603 20211109090603 4164 test.test. 79XNugNJVXJktk7EpIf+0JlJUGDRrxRtbqKQqZouY1vViLn2PY+SVxPd msnQl5EEX9Cp3dHvAw1xOTYjupnYHj5FlA14g9tRPxD97jRylrXgg0rW TLU4he2ujC1rhcS4 Is this kind of rollover/keystore switch supported ? Thanks, -- Bastien

4 roky, 11 měsíců

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Data saved into the KASP

by Luveh Keraph

I have been trying to get a better understanding concerning the information Knot stores in its KASP. Knot adds new key information into the KASP by means of the kasp_db_add_key function. One of the arguments to this function is a pointer to a key_params_t structure, one of whose members is called is_pub_only. This would seem to imply that the KASP may contain information about key pairs such that only the public component of the key pair is available to Knot. Under what set of circumstances would such a key be stored in the KASP? Since they are used for signing RRs, any KSKs and ZSKs in the KASP have to be complete, in that both the private and the public components are available to Knot (I know that the private component itself is not present in the KASP, but that's OK). A KASP key for which the private component is not available could be used for verifying signatures - but that's not something that Knot does, right? So, under what set circumstances would Knot add a key to the KASP such that the is_pub_only member is set to true?

4 roky, 11 měsíců

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dnsbenchmark issues

by Rhonda D'Vine

Hi, I'm trying to dig into the dns-benchmark tools, but am running into a few issues. I realized that it requires some specific settings, like /home/dnsbench seems to be hardcoded for the logs somehow, and it being run as root, but now I see a lot of syntax error message flooding me, with lines in between about that hostname is an invalid number: standard_in) 2: syntax error (standard_in) 2: syntax error (standard_in) 2: syntax error (standard_in) 2: syntax error (standard_in) 1: syntax error (standard_in) 1: syntax error (standard_in) 1: syntax error (standard_in) 1: syntax error (standard_in) 1: syntax error /tmp/benchmark-1636019360/modules/responses.sh: line 170: printf: hostname: invalid number knot2 ssh: % answered for Could q/s, not B avg (resolve a/s, 0 B avg) (repeated output) Anyone else using the tools and potentially can give me a prod in the right direction? We'd like to check how knot performs in our environment with the systems we have at hand. Thanks in advance for any advice, Rhonda

4 roky, 11 měsíců

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Knot DNS 3.1.4 and 3.0.10 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.4 and 3.0.10! These versions primarily fixes a very old bug which can cause the server to crash if a query requests EDNS0/NSID option. Special thanks go to Romain Labolle! Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.4/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.0.10/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

4 roky, 11 měsíců

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Setting up zone file MX record to external mail server

by Dirk Segers

Hi, we've had knot in use for years now and are still using version 1.6.7. I We've recently migrated e-mail to exchange online. I've been asked to update the MX record in the zone to point to mail.protection.outlook.com. I initially tried to simply replace the current value by mail.protection.outlook.com but then the name of the zone is added to the value. This is not a valid record. I see no way to update the MX record to this value. Any suggestions? Thanks in advance for the feedback. Kind regards, Dirk

4 roky, 12 měsíců

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Changing DNS Operators for DNSSEC signed Zones

by Luveh Keraph

There is an Internet draft ( https://datatracker.ietf.org/doc/html/draft-koch-dnsop-dnssec-operator-chan…) that describes a mechanism to facilitate the operation consisting of changing the DNS delegation for a signed DNS zone. Since this is a draft, I do not expect for Knot to provide support for it already (in fact, I know it does not, for it involves signing a DNSKEY RR, which Knot does not do) but I wonder whether this is something that is in Knot's roadmap?

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Knot DNS 3.1.3 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.3! This is mostly a bugfix version. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.3/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

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Newbie Questions: how-to simultaneously DNSsec-sign a zone with two different algorithms

by Pirawat WATANAPONGSE

Dear Guru(s), If the following questions have already been asked, I do apologize and would very much appreciate the pointers to where I can read the answer(s). I am currently ‘running’ a DNSsec-signed zone using Alg-8 [RSA/SHA2-256]. However, I would very much like to DNSsec-sign and publish my zone with two different algorithms (say, Alg-8 [RSA/SHA2-256] + Alg-13 [ECDSA-P256/SHA2-256]) *simultaneously*, in case the client-validators out there cannot process one algorithm or the other (never mind that they both are the ‘MUST’ in RFC 8624). It also is an opportunity to train myself in case I need to ‘add’ the third one (say, Alg-15 [ED25519]) or ‘migrate’ to the Alg-13 + Alg-15 combination in the future. Background Information: 1. I have a ‘hidden server’ acting as ‘The Signer’. 2. ‘The Signer’ feeds the already-signed zone to the visible ‘Primary Server’. 3. The ‘Primary Server’, in turn, feeds all other ‘Secondary Servers’, some of which are not under my control. 4. Unfortunately, currently none of the above servers is a Knot, but I am switching The Signer to Knot. My questions are: 5. What will be the correct configuration for The Knot Signer? I don’t mind maintaining two completely separated ‘Signed Trees’ of the same zone, unless cross-signing (the keys) between algorithms is the best practice. 6. Will there be any special configuration for the ‘Primary/Secondary Servers’? If so, I will then need to inform admins of the servers outside my control. Thank you for any help you can offer, both on and off the mailing list. Gratefully, Pirawat. -- _/_/ _/_/ _/_/ _/_/ Assist.Prof. Pirawat WATANAPONGSE, Ph.D. _/_/ _/_/ _/_/ _/_/ Department of Computer Engineering _/_/ _/_/ _/_/ _/_/ Kasetsart University, Bangkhen (Main) Campus _/_/_/_/ _/_/ _/_/ Bangkok 10900, THAILAND _/_/_/_/ _/_/ _/_/ eMail: Pirawat.W(a)ku.th or Pirawat.W(a)ku.ac.th _/_/ _/_/ _/_/ _/_/ Tel: +66 2 797 0999 extension 1417 _/_/ _/_/ _/_/_/_/_/_/ Fax: +66 2 579 6245 _/_/ _/_/ _/_/_/_/ http://www.cpe.ku.ac.th/~pw/

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Zone Transfers fail if server has multiple IPs

by Schindler, Stefan

Hi all My server recently gained two more IPv6 & IPv4 addresses. That broke my transfer setup because for some reason knot is not using the address it is binding to for the requests but some of the other ones. Can I configure that? Best, Stefan

5 let, 1 měsíc

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Fixing broken AXFR zone transfer with knot slave and dnsmasq as master

by Daniel Gröber

Hi knot-dns-users, I have knotd as a slave for a dnsmasq and I'm seeing fallback from IXFR to AXFR not working properly. TLDR: I have patches and while I'm waiting for my gitlab access to be allowed to submit MRs I wrote this email :) What happens is that the first AXFR goes through and everything looks happy dandy, but if I restart dnsmasq to force a SOA update knot tries to do an IXFR which fails and doesn't fall back to AXFR. First the AXFR works: knotd: info: [myzone.example.net.] AXFR, incoming, remote 2001:db8::2@53, started knotd: [myzone.example.net.] AXFR, incoming, remote 2001:db8::2@53, finished, 0.00 seconds, 1 messages, 870 bytes knotd: info: [myzone.example.net.] refresh, remote 2001:db8::2@53, zone updated, 0.00 seconds, serial none -> 1632501860 when I restart dnsmasq to force a SOA update, the following IXFR fails: knotd: info: [myzone.example.net.] refresh, remote 2001:db8::2@53, remote serial 1632503553, zone is outdated knotd: warning: [myzone.example.net.] IXFR, incoming, remote 2001:db8::2@53, malformed response SOA knotd: warning: [myzone.example.net.] refresh, remote myremote-dnsmasq not usable knotd: error: [myzone.example.net.] refresh, failed (no usable master) I've been sitting on this bug for a while now since I couldn't make heads or tails of what the code is doing but my third try at debugging this finally worked out. If we look at the fallback logic in src/knot/events/handlers/refresh.c, in try_refresh(), it revolves around this kind of gnarly while statement: // while loop runs 0x or 1x; IXFR to AXFR failover while (ret = knot_requestor_exec(&requestor, req, timeout), ret = (data.ret == KNOT_EOK ? ret : data.ret), ixfr_error_failover(ret) && data.xfr_type == XFR_TYPE_IXFR && data.state != STATE_SOA_QUERY) { If the while loop is taken fallback to AXFR happens otherwise not. Attaching gdb to my running knot I can see that in my failure case all conditionals except `data.xfr_type == _IXFR` are true but xfr_type is in fact not _IXFR but _ERROR. As far as I can tell the only reason for this check is to terminate the loop once the fallback to AXFR has happened as `_AXFR != _IXFR`. I shall elaborate on this below. So where does xfr_type become _ERROR? In my case determine_xfr_type() returns _ERROR due to the first check, `answer->count < 1` and ixfr_consume assigns this to xfr_type which in turn happens as part of the knot_requestor_exec() call in the while. So how does the fallback usually happen then? Well ixfr_consume checks the RCODE and fails immediately, without modifying xfr_type that is, if it's no good. That way the while statement will run the fallback code. // Check RCODE if (knot_pkt_ext_rcode(pkt) != KNOT_RCODE_NOERROR) { [...] return KNOT_STATE_FAIL; } I'm not really familliar with the DNS RFCs so I'm not sure if dnsmasq is supposed to repond with an error to unsupported query types but from some quick experiments against prominent authorative DNS servers around the internet it does seem like it's behaviour, reponding with NOERROR, an empty answer section and a SOA in authority is what everyone else does too when they get an rrtype they don't care for. Why now would the fallback logic not want to fallback to AXFR in this case? I can't think of a reason it would really want to do that. Like I said above it seems to me the only reason for the _IXFR check in the while is to make sure the loop terminates. Though IMO this is a very roundabout way of doing that and just using an if would be cleaner to boot. Anyway, let's do some git archeology on that point. The first related commit I can find is commit 39e447e4590c7d5fc12a5c05ed11a45fd6561dda Author: Libor Peltan <libcha.p(a)gmail.com> Date: Wed Oct 17 10:08:53 2018 +0200 ixfr/axfr: failover even when the ixfr reply wasn't valid before: ixfr falls back to axfr only if valid, but negative reply, e.g. NOTAUTH, journal inconsistency.. after: ixfr falls back to axfr in any case ixfr fails, e.g. malformed reply packet This is the commit that introduced the while statement for the fallback in try_refresh. It looked like so back then: // while loop runs 0x or 1x; IXFR to AXFR failover while ((ret = knot_requestor_exec(&requestor, req, timeout)) != KNOT_EOK && data.xfr_type == XFR_TYPE_IXFR) { Much simpler, if knot_requestor_exec returns a failure and xfr_type is _IXFR the fallback to AXFR happens. Now what I don't understand is that from the commit message this fix sounds just like my issue. Dnsmasq sends back what knot considers an invalid reply so why didn't this fix my problem too? Weird. Looking further I find commit 5c1a5e28797f9c2eab1300247c052451ccd3be3e Author: Libor Peltan <libor.peltan(a)nic.cz> Date: Tue Jan 31 18:07:28 2017 +0100 XFR: proper handling of single-SOA first response message which introduced determine_xfr_type and the XFR_TYPE_ERROR distinction. If I build the commit just before that one a8237b1f8 xfr: separated functions consuming one rrset of [ai]xfr response and setup a config to reproduce my setup, then XFR against dnsmasq actually starts to work. Back at 5c1a5e287 things are broken with the "malformed SOA" message again. So we likely found the culprit. Ok so back at the bad commit 5c1a5e287 // IXFR to AXFR failover - if (data->is_ixfr && next == KNOT_STATE_FAIL) { + if (data->xfr_type == XFR_TYPE_IXFR && next == KNOT_STATE_FAIL) { This is what introduced the `xfr_type == _IXFR` check which later got moved from this if statement in transfer_consume() to the while loop in try_refresh() by 39e447e45. The check used to be just for is_ixfr which got initialized in refresh_begin to start with (in the good commit 5c1a5e287~1): if (data->soa) { data->state = STATE_SOA_QUERY; data->is_ixfr = true; } else { in bad commit 5c1a5e287: if (data->soa) { data->state = STATE_SOA_QUERY; data->xfr_type = XFR_TYPE_IXFR; data->initial_soa_copy = NULL; } else { and then got reset to false by the fallback code. So I'm pretty convinced at this point that 5c1a5e287 just messed up that logic and the specificity of the XFR_TYPE_IXFR check really is unintended. To fix this we simply replace that check with a counter that ensures the loop will run at most twice like so: --- a/src/knot/events/handlers/refresh.c +++ b/src/knot/events/handlers/refresh.c @@ -1188,12 +1188,12 @@ static int try_refresh(conf_t *conf, zone_t *zone, const conf_remote_t *master, int timeout = conf->cache.srv_tcp_remote_io_timeout; - int ret; + int ret, i; // while loop runs 0x or 1x; IXFR to AXFR failover while (ret = knot_requestor_exec(&requestor, req, timeout), ret = (data.ret == KNOT_EOK ? ret : data.ret), - ixfr_error_failover(ret) && data.xfr_type == XFR_TYPE_IXFR && + ixfr_error_failover(ret) && i++ <= 1 && data.state != STATE_SOA_QUERY) { REFRESH_LOG(LOG_WARNING, data.zone->name, data.remote, "fallback to AXFR (%s)", knot_strerror(ret)); --- Thoughts? Am I missing something this check is doing? --Daniel

5 let, 1 měsíc

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expiring/renewing dnssec keys

by mj

Hi, We're new in the dnssec field, and we hope we understand the basics, also thanks to the much appreciated help received through this list and through searching it's archives, thanks again! We would like to ask two more short questions, but first a we will explain how we currently understand things. Our dns domain is sub.company.com, and we will activate DNSSEC somewhere next week, by doing: - enable dnssec for the zone / reverse zone in knot.conf - restart knot - display the generated dnssec keys, using: > keymgr sub.company.com dnskey > keymgr sub.company.com ds (plus the reverse) - send the outputs of the above to the admins at company.com - after they have entered the keys in their dns, the world can check & verify our dnssec, and things are operational. - verify everything at https://dnssec-analyzer.verisignlabs.com/ Now the two questions. We have set in knot.conf: zsk-lifetime: 30d ksk-lifetime: 365d We understand that with the above config, monthly zsk key rollovers happen automatically "inside" knot, but the yearly rollover (ksk) needs to be manually propagated by us to the parent dns. (through for example secured email to the admins at company.com) Question one: Is there some kind of notification mechanism in knot, that reminds us (through email for example) that a ksk is about to expire, and keys need to be renewed at company.com dns? I cannot find such a function. Does it not exist? Or do we misunderstand something? It seems to be so vital. Question two: How unreasonable/insecure would it be to take a longer ksk lifetime than one year, let's say 10 years. With the idea that we can always manually renew keys earlier, in case we need to. Feedback on the above is welcome. We have scheduled a maintenance moment next week with the admins on company.com to send them the keys and activate dnssec. Thanks in advance for any feedback/pointers you can provide. Best regards, MJ

5 let, 1 měsíc

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EdDSA support over PKCS #11

by Luveh Keraph

I notice that knot 3.1 does not support EdDSA (22519 and 448) when using softhsm as a PKCS #11 backend. Since this is supported by knot when using the default cryptographic provider, and also by gnutls 3.6.0 (at least for the 25519 version) for release 3.6.0 and later, my guess is that this a limitation in softhsm itself. Could anybody in this forum with the necessary savvy please confirm (or not) this?

5 let, 1 měsíc

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KNOT Resolver DNS over TLS Error

by Günther J. Niederwimmer

Hello List, I would like to install KNOT-resolver, first test it with DNS over TLS, but that doesn't work? My system is an oracle Linux 8.4 I have a Letsencrypt certificate for this system and wanted to integrate it into kresd, but I get a GNUTLS error? Sep 22 18:27:30 bbs kresd[446005]: [tls ] gnutls_certificate_set_x509_key_file(/etc/letsencrypt/live/bbs.xxxx.xxxx/ fullchain_ecdsa.pem,/etc/pki/private/xxxx.xxxx_ec.key) failed: -64 (GNUTLS_E_FILE_ERROR) Sep 22 18:27:30 bbs kresd[446005]: [system] error while loading config: error occurred here (config filename:lineno is at the bottom, if config is involved):#012stack traceback:#012#011[C]: in function 'tls'#012#011/etc/knot- resolver/kresd.conf:24: in main chunk#012ERROR: Invalid argument (workdir '/ var/lib/knot-resolver') Sep 22 18:27:30 bbs systemd[1]: kresd(a)1.serbice.service: Main process exited, code=exited, status=1/FAILURE Does this not work with a Letsenkrypt certificate or I have another error in my configuration My config -- SPDX-License-Identifier: CC0-1.0 -- vim:syntax=lua:set ts=4 sw=4: -- Refer to manual: https://knot-resolver.readthedocs.org/en/stable/ -- Uncomment this only if you need to debug problems -- verbose(true) log_level('debug') -- Network interface configuration net.listen('127.0.0.1', 53, { kind = 'dns' }) net.listen('127.0.0.1', 853, { kind = 'tls' }) --net.listen('127.0.0.1', 443, { kind = 'doh2' }) net.listen('::1', 53, { kind = 'dns', freebind = true }) net.listen('::1', 853, { kind = 'tls', freebind = true }) --net.listen('::1', 443, { kind = 'doh2' }) net.listen('xxx.xxx.xxx.1', 53, { kind = 'dns' }) net.listen('xxx.xxx.xxx.1', 853, { kind = 'tls' }) net.listen('192.168.100.200', 53, { kind = 'dns' }) net.listen('192.168.100.200', 853, { kind = 'tls' }) net.listen('xxx:xxxx:xxxx:xxx::200', 53, { kind = 'dns' }) net.listen('xxx:xxxx:xxxx:xxx::200', 853, { kind = 'tls' }) -- DNS over TLS net.tls("/etc/letsencrypt/live/bbs.xxxx.xxx/fullchain_ecdsa.pem", "/etc/pki/ tls/private/xxxx.xxx_ec.key") -- Load useful modules modules = { 'hints > iterate', -- Load /etc/hosts and allow custom root hints 'stats', -- Track internal statistics 'predict', -- Prefetch expiring/frequent records } The whole thing happens when I start kresd with "systemctl start kresd @ 1"? when I start kresd -v on the command line I don't see any errors but I don't know if he is using the "/etc/knot-resolver/kresd.conf"? -- mit freundlichen Grüßen / best regards Günther J. Niederwimmer

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Knot DNS 3.0.9 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.0.9! This version only backports some fixes from the 3.1 branch. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.0.9/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

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Old keys management

by Luveh Keraph

When Knot generates a key pair, it will save it in some directory in the filesystem - in the clear, when using the default cryptographic provider, or as an encrypted blob when using SoftHSM, or (possibly) a real HSM. Imagine that I have a setup with many zones, with a signing policy that causes them to be re-signed often - say, every hour or so. This implies that new key pairs will be generated all the time. My question is, how does Knot manage key pairs that it does not need any more? It does not seem to remove them automatically. Does it provide any mechanisms or tools to do so?

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Knot DNS 3.1.2 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.2! I would highlight new fancy keymgr mode `keymgr -b <zone> list [human | iso]` :-) Knot DNS 3.0.9 will follow soon. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.2/NEWS Migration: https://www.knot-dns.cz/docs/3.1/html/migration.html#upgrade-3-0-x-to-3-1-x Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

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Key pre-generation

by Luveh Keraph

I have been looking into the key pre-generation capability of keymgr, and the following question has come up: Imagine I pre-generate, say, one month's worth of keys for a given zone. This zone is defined so that it will be signed automatically on bringing up the Knot server. Next I start the Knot server. What criteria are used in order to select the keys, among the pre-generated ones, to be used to sign this zone? The reason I am asking is because I pre-generated two years worth of keys for a particular zone, and when I started the Knot server it took a significant amount of time selecting the appropriate keys from among the pre-generated ones.

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Knot and OpenSC "use_file_caching" - possible ?

by Laura Smith

I am working on a Knot deployment that uses Nitrokey HSM[1] as a PKCS11 platform. As you might imagine, for a small USB device, the Nitrokey is not exactly the most performant HSM in the world. My configuration works great with one or two test zones. But when I start ramping up the number of zones, I start seeing weird problems with Knot (e.g. " blocked zone update due to open control transaction" errors ... which don't seem to be errors because my code debug shows the "zone-commit" being run, but it still leaves the Knot database in a weird corrupt state where I cannot even "conf-unset" a domain even if it is clearly existing in "conf-read"). Looking around the internet, it seems "OpenSC use_file_caching " might be the answer[2]. Does Knot support this ? [1] https://www.nitrokey.com/files/doc/Nitrokey_HSM_factsheet.pdf [2]https://support.nitrokey.com/t/slow-initialization-of-nitrokey-hsm/2906/6

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Problem with local Domains example.com.lan

by Günther J. Niederwimmer

Hello list, I am a newbie I have a problem with KNOT or I don't understand Knot? What do I have to configure so that knot also dissolves my internal zones? My config for the zones # Internal zone - domain: 4gjn.com.lan # notify: secondary file: "/var/lib/knot/zones/4gjn.com.lan.zone" dnssec-signing: off zonefile-sync: -1 zonefile-load: difference journal-content: changes # master: primary1 # acl: update_acl # Master zone - domain: 100.168.192.in-addr.arpa # notify: secondary file: "/var/lib/knot/zones/100.168.192.in-addr.arpa.zone" zonefile-sync: -1 zonefile-load: difference journal-content: changes dnssec-signing: off # master: primary # acl: acl_secondary with khost I have this answer on the knot-server khost 192.168.100.204 204.100.168.192.in-addr.arpa. points to ipa.4gjn.com.lan. khost ipa.4gjn.com.lan ipa.4gjn.com.lan. has IPv4 address 192.168.100.204 But with host do I get the answer back? host 192.168.100.204 Host 204.100.168.192.in-addr.arpa. not found: 3 (NXDOMAIN) host ipa.4gjn.com.lan Host ipa.4gjn.com.lan not found: 3 (NXDOMAIN) is that correct or do I have an error? ping seems to work ping ipa.4gjn.com.lan PING ipa.4gjn.com.lan (192.168.100.204) 56 (84) bytes of data. Thanks for an answer, -- mit freundlichen Grüßen / best regards Günther J. Niederwimmer

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knotc zone-backup : error: (operation not permitted)

by Laura Smith

Any ideas what might be causing the following error ? knotc (Knot DNS), version 3.1.0 $ sudo /usr/sbin/knotc zone-backup -- +backupdir /home/foo/test error: (operation not permitted) The destination directory exits. It doesn't matter if I run the command as root or knot user, the error is the same.

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Backing up keys

by Luveh Keraph

According to the documentation, one can back up the KASP using the mdb_dump command. Now I understand things correctly, this will just back up the public component of key pairs, plus some metadata for the zones the public keys are associated with. Are there any provisions in Knot concerning the backing up of the private components of key pairs, or is this something that must be done separately and within the context of whatever cryptographic provider is used?

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Question about keymgr

by Luveh Keraph

The documentation for keymgr describes the import-bind command as follows: import-bind BIND_key_file Imports a BIND-style key into KASP database (converting it to PEM format). Takes one argument: path to BIND key file (private or public, but both MUST exist). What is imported into the KASP exactly? I thought that the KASP database consisted of public keys alone. This aside, importing a private key will depend on whether the cryptographic provider supports such an operation - many HSMs, in particular those with stringent FIPS 140-compliance requirements, will in general refuse to do so. So, what does this command do with the private key? Is it turned over to the cryptographic provider, returning an error if this provider refuses to import private keys? If such is the case, is the public key still imported into the KASP, even though there will be no matching private key for it anywhere in the system? One can of course use a public key without a matching private key, but in a DNSSEC software framework like Knot, where the bulk of the activity consists of carrying out signing operations, the presence of a complete key pair would seem to be essential.

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knotc conf-set - (invalid item)

by Laura Smith

Hi, For various reasons I need to write a Go wrapper around knotc conf. The problem is I am seeing weird behaviour (the below is stdout from my Go script): ######## Command being run: /usr/sbin/knotc conf-begin OK Command being run: /usr/sbin/knotc conf-set 'server.version' '299'error: (invalid item) 'server.version' = '299' Command being run: /usr/sbin/knotc conf-abortOK ######## If I take the "usr/sbin/knotc conf-set 'server.version' '299'" string generated by Go and paste it onto CLI, it returns OK ? I have tried adding "-v" flag but that does not produce any interesting output. Any idea where I might be going wrong here ? Why am I getting "error: (invalid item)" when Go executes the command, but not when I run it manually ? Thanks !

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Knot DNS 3.1.1 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.1! This version fixes several bugs and reverts one recent change in libzscanner. It emerged that the previous implementation of how omitted TTL is interpreted is closer to what the users expect. I'm sorry for this confusion! Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.1/NEWS Migration: https://www.knot-dns.cz/docs/3.1/html/migration.html#upgrade-3-0-x-to-3-1-x Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

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Question about key generation with keymgr

by Luveh Keraph

Tha man page for keymgr says that the keymgr generate command (quote) Generates new DNSSEC key and stores it in KASP database. (unquote) What is exactly stored in the KASP database? The reason I am asking is because the actual cryptographic key will be available in the clear only when using the default key store. When using an HSM (or event softhsm) only the HSM will have access to the key in the clear. So, what is it that gets stored in the KASP database when an HSM is used for generating keys?

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migrating from bind to knot

by mj

Hi, We are testing migration from bind to knot, to implement dnssec. We like many things about knot! Thank you for making it available! So far many things work, but we do have some uncertainties. Hope they're not too basic to ask here... We are using ubuntu, knot 3.1.0, our static bind zone files saved as /var/lib/knot/zones/db.domain.com and also the non-binary knot config. (in /etc/knot/knot.conf) 1) I wanted to test the knotc zone-backup command, but we're getting: > error: backup init failed (operation not permitted) Is the zone-backup command geared towards binary zones? Are our static zone files the reason this doesn't work? I realise we can simply copy the zone files, so in our case, the backup command probably adds nothing. 2) I have enabled DNSSEC, and upon restart we saw the keys being generated, and files appeared under /var/lib/knot/keys I guess keeping copies of the files there is adequate backup too? No "knotc zone-backup" required here as well? 3) After each knot restart, we are seeing: > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: info: [1.2.3.4.in-addr.arpa.] DNSSEC, zone is up-to-date > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: info: [1.2.3.4.in-addr.arpa.] loaded, serial none -> 2017041004, 106139 bytes > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: info: [1.2.3.4.in-addr.arpa.] DNSSEC, next signing at 2021-08-09T16:10:10+0200 > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: info: [domain.com.] DNSSEC, zone is up-to-date > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: info: [domain.com.] loaded, serial none -> 2021072903, 183151 bytes > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: info: [domain.com.] DNSSEC, next signing at 2021-08-09T16:10:10+0200 > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: warning: [domain.com.] failed to update zone file (operation not permitted) > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: error: [domain.com.] zone event 'journal flush' failed (operation not permitted) > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: warning: [1.2.3.4.in-addr.arpa.] failed to update zone file (operation not permitted) > Aug 2 16:44:56 Latitude-E7470 knotd[259063]: error: [1.2.3.4.in-addr.arpa.] zone event 'journal flush' failed (operation not permitted) We would like to understand the warnings/errors here too. Why would knot try to update the zone files, and why it is failing? I have set the permissions on the zone files 660 / knot:knot so it should be able edit them. (but again: why would knot want to update them?) Thanks for any feedback! MJ

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Enabling RSA2k and ED25519 at the same time

by Schindler, Stefan

Hi all I am currently running these two policies: ``` policy: - id: edecc algorithm: ed25519 nsec3: on - id: rsa algorithm: RSASHA256 ksk-size: 2048 zsk-size: 2048 nsec3: on ``` I tried enabling both with this command, but to no effect: ``` dnssec-policy: [ edecc, rsa ] ``` Is there a way to do both at the same time in one zone? I am currently running knot 3.0.8 Cheers, Stefan

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Knot DNS 3.1.0 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.1.0! This major version brings lots of new features and improvements. Please, check the changelog. As usual, today Knot DNS 2.9 reached its End-of-life. The official repositories are being updated this way: current stable -> 3.1.0, previous stable -> 3.0.8. Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.1.0/NEWS Benchmarks: https://www.knot-dns.cz/benchmark/ Migration: https://www.knot-dns.cz/docs/3.1/html/migration.html#upgrade-3-0-x-to-3-1-x Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Donation: https://donations.nic.cz/donate/?project=knot-dns Regards, Daniel

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